Answer:
-5
Step-by-step explanation:
First, find the solutions to the quadratic equation.
[tex]3x^2+15x+9=0\\3(x^2+5x+3)=0[/tex]
Since this is not factorable, use the quadratic formula and simplify.
x = (-5±[tex]\sqrt{(5)^2-4(1)(3)}[/tex])÷2(1)
x = (-5±[tex]\sqrt{13}[/tex])÷2
So x1 = (-5+[tex]\sqrt{13}[/tex])÷2 and x2 = (-5-[tex]\sqrt{13}[/tex])÷2
Now just sub it into the equation and simplify:
(-5+[tex]\sqrt{13}[/tex])÷2 + (-5-[tex]\sqrt{13}[/tex])÷2
= [tex]\frac{-5+\sqrt{13} + (-5)-\sqrt{13}}{2}[/tex]
= [tex]\frac{(-5)+(-5)+\sqrt{13}-\sqrt{13} }{2}[/tex]
= [tex]\frac{-10}{2}[/tex]
= -5
Age of first heart attack - The horizontal axis is age. The vertical axis is frequency (number of people who had their first heart attack at that age). The population is people in the US who have had at least one heart attack. Shape of distribution:
Answer: The shape of the distribution of the age of first heart attack in the US population who have had at least one heart attack is likely to be positively skewed, with the majority of cases occurring in older age groups and a relatively small number of cases occurring in younger age groups. The frequency of heart attacks generally increases with age, reaching a peak in the older age groups.
Step-by-step explanation:
Farthest Point. Which of the following points is farthest from P (–1, 3)? Show the necessary solutions.
a. R(2, 4)
b. S(-4, 1)
c. T(0, 5)
d. U(3, -2)
The farthest point from P is point U with a distance of 6.4 units
How to determine the farthest pointFrom the question, we have the following parameters that can be used in our computation:
P = (-1, 3)
To determine the farthest point, we make use of the distance formula represented as
distance = √[(y₂ - y₁)² + (x₂ - x₁)²]
So, we have
PR = √[(4 - 3)² + (2 + 1)²] = 3.2
PS = √[(1 - 3)² + (-4 + 1)²] = 3.6
PT = √[(5 - 3)² + (0 + 1)²] = 2.2
PU = √[(-2 - 3)² + (3 + 1)²] = 6.4
This means that the fartherst point is point U
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(b) If the sum of two numbers is 10 and difference is 4. Find the number.
Answer:6
Step-by-step explanation:
The two numbers are 3 and 7.
Let the two numbers be x and y.
Considering the first statement :
x + y = 10 ...........................(1)
Considering the second statement:
x - y = 4 ............................(2)
Adding equations (1) and (2):
x + y + x - y = 10 + 4
2x = 14
x = 7
Substituting the value of x in equation (1):
7 + y = 10
y = 10 - 7
y = 3
Therefore, the value of the two numbers is 3 and 7.
For reference:
https://www.cliffsnotes.com/study-guides/algebra/algebra-i/word-problems/number-problems-with-two-variables
Given P is the incenter of ABC find the length of PX
The length of PX is 1.56.
The Pythagorean Theorem is a mathematical principle that relates the lengths of the sides of a right triangle. It states that in a right triangle, the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the lengths of the other two sides.
c² = a² + b²
The Pythagorean Theorem is one of the most famous and widely-used theorems in mathematics, and is a fundamental principle in geometry. It is used to find the length of one side of a right triangle when the lengths of the other two sides are known, and is also used to test whether a triangle is a right triangle.
Since YP is perpendicular to AB, we have right triangle APY with AP as hypotenuse and PY as the height.
Using the Pythagorean theorem, we can find the length of AP:
AP² = AY² + PY²
AP² = 4.7² + 1.4²
AP² = 22.09
AP = 4.7
Similarly, since ZP is perpendicular to BC, we have right triangle CPZ with CP as hypotenuse and PZ as the height.
Using the Pythagorean theorem, we can find the length of CP:
CP² = CZ² + PZ²
CP² = 3.2² + PZ²
CP² = 10.24
CP = 3.2
Since PX is perpendicular to AB, we have right triangle BPX with BP as hypotenuse and PX as the height.
Using the Pythagorean theorem, we can find the length of BP:
BP^2 = AP^2 + CP^2
BP^2 = 4.7^2 + 3.2^2
BP^2 = 26.69
BP = 5.15
Finally, using the Pythagorean theorem, we can find the length of PX:
PX^2 = BP^2 - PY^2
PX^2 = 5.15^2 - 1.4^2
PX^2 = 2.46
PX = 1.56
Therefore, the length of PX is 1.56.
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Solve with full solution
Q1. A ladder 9 m long reaches to a point below the top of building. From the foot of the ladder, the angle of olevation of the building is 60°. Find the height of the building. Here the ladder makes the angle 45° with ground. (Ans=11.02m)
Q2. A vertical pole is divided in the ratio 9:1 .If both segments of pole subtend equal angles to each other at a distance of 20m away from the foot of pole, find height of pole. (Ans=178.8m)
Answer:
Q 1 : Solution:
Let the height of the building be h.
We know that tan(60) = h/9 (angle of elevation formula)
h = 9tan(60) = 9sqrt(3)/3 = 3*sqrt(3) = 3.464101615 m (approx)
Q 2 : Solution:
Let the height of the pole be h.
Let the shorter segment be x, and the longer segment be 9x.
We know that tan(theta) = x/(20) = 9x/(20+h) (angle subtended formula)
By cross multiplying and simplifying, we get:
x = (20h)/(h+180)
The ratio of the segments is x:9x = 1:9, so x = (20h)/(h+180) = 1/10 * h
h = 10x = (20h)/(h+180)
h^2 + 180h - 20h^2 = 0
h(20-h) = 0
h = 0 or h = 20
Since the pole has a height, h = 20m is not possible, so the height of the pole is h = 178.8m
One base of a trapezoid is 1 in longer than 2 times the other base. find the lengths of the bases if the trapezoid is 4in high and a area of 20in.
The length of the bases for the trapezoid are
shorter base is 3 in and the longer base is 7 in
How to find the length of the basesThe formula for area of trapezoid is
= 1/2 sum of bases * height
base of the trapezoid
20 = 1/2 sum of bases * 4
1/2 sum of bases = 5
sum of bases = 10
The relationship between the bases
longer base = 2 * shorter base + 1
sum of bases = longer base + shorter base
sum of bases = 2 * shorter base + 1 + shorter base
sum of bases = 3 shorter base + 1
substituting will result to
10 = 3 shorter base + 1
10 - 1 = 3 shorter base
9 = 3 shorter base
shorter base = 3 in
longer base = 2 * shorter base + 1
longer base = 2 * 3 + 1
longer base = 7 in
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Categorize the type of sampling (simple random sample, stratified sample; systematic sample; cluster sample; or convenience sample) used: To judge the appeal of a proposed television sitcom, a random sample of 10 people from each of three different age categories was selected and those chosen were asked to rate a pilot show: simple random sample stratified sample systematic sample cluster sample
The type of sampling used to judge the appeal of the television sitcom is a b) stratified sample.
A stratified sample is a type of sampling where the population is divided into subgroups or strata based on certain characteristics, and then a random sample is taken from each of these strata. In this case, the population is divided into three age categories and a random sample of 10 people is selected from each category.
Stratified sampling is useful when the characteristics of each stratum are different and you want to make sure that the sample accurately reflects the entire population. By dividing the population into age categories, this method ensures that the sample is representative of the different age groups and their opinions on the pilot show.
Overall, stratified sampling is a useful method for accurately estimating the characteristics of a population by taking into account any relevant differences within it.
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the diffrence of 54 and 32 mutlipted by the diffrence of 8 and 5
Answer:
66
Step-by-step explanation:
the difference of 54 and 32 is 54 - 32 = 22
the difference of 8 and 5 is 8 - 5 = 3
then
22 × 3 = 66
Consider the graph please
need help will reward
The factor by which g([tex]x[/tex]) grows over the interval from 14 to 16 is 1.1429.
Whar is factor?The factor is a number that can be divided evenly into another number. For example, 2, 3, 5 and 10 are all factors of 10. When two or more numbers are multiplied together, each number is a factor of the product.
The factor by which g(x) grows over the interval from 14 to 16 can be determined by calculating the ratio of the values of g(x) at the endpoints of the interval.
At x = 14, g(x) = 4(14) = 56
At x = 16, g(x) = 4(16) = 64
The factor by which g(x) grows over the interval from 14 to 16 is 64/56 = 1.1429.
This means that g(x) grows by a factor of 1.1429 over the interval from 14 to 16.
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Please help me with this question.
The solution of the given differential initial value problem is
y(x) = 1/25 e⁻⁵ˣ(6e⁵ˣ - 5x - 6).
What is initial value problem?In multivariable calculus, an initial value problem is an ordinary differential equation together with an initial condition which specifies the value of the unknown function at a given point in the domain.Given is the initial value problem -
y''' + 10y'' + 25y' = 0
We can write the -
[tex]$25 \frac{d}{d x} y{\left(x \right)} + 10 \frac{d^{2}}{d x^{2}} y{\left(x \right)} + \frac{d^{3}}{d x^{3}} y{\left(x \right)} = 0$[/tex]
The given differential equation can be solved and written as -
y(x) = 1/25 e⁻⁵ˣ(6e⁵ˣ - 5x - 6)
Therefore, the solution of the given differential initial value problem is
y(x) = 1/25 e⁻⁵ˣ(6e⁵ˣ - 5x - 6).
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Using the information below, work out the length t.
Give your answer to the nearest integer.
The length t of the triangle side is 44 mm
What is the trigonometric ratio?
Trigonometric ratios are the ratios of a right triangle's sides. The sine (sin), cosine (cos), and tangent (tan) are three often used trigonometric ratios. There are other trigonometric ratios which are reciprocals of these ratios.
according to law of cosines,
t² = 41² +54² - 2 (41)(54) cos x
t² = 41² +54² - 2 (41)(54) ( 3/5)
t² = 1681 + 2916 - (13284/5)
t² = 1681 + 2916 - (13284/5)
t² = 4597 - 2656.8 =1940.2
t = ±√1940.2 = ±44 mm
length is positive
The length t of the triangle side is 44 mm
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A random sample of residents in city J were surveyed about whether they supported raising taxes to increase bus service for the city. From the results, a 95 percent confidence interval was constructed to estimate the proportion of people in the city who support the increase. The interval was (0.46,0.52). Based on the confidence interval, which of the following claims is supported?
A. More than 90 percent of the residents support the increase.
B. Fewer than 10 percent of the residents support the increase.
C. More than 40 percent of the residents support the increase.
D. More than 60 percent of the residents support the increase.
E. Fewer than 25 percent of the residents support the increase.
Confidence interval refer a range of estimates for an unknown parameter and here unknown parameter is percentage of residents support the increase. So, the correct answer is option(c), i.e., More than 40 percent of the residents support the increase.
We have, A random sample of residents in city J, about whether they supported raising taxes to increase bus service for the city and sample is based on survey.
Significance level = 95%
Confidence interval = (0.46,0.52)
Confidence interval: A confidence interval, in statistics, defines to the probability that a population parameter will fall between two set values. Therefore, the population parameter i.e., the proportion lies in range of between 0.46 to 0.52. Therefore the actual population proportion of people who support the increase is surely greater than 40%, but always be less than 52%. So, out of five options, option (c) is that satisfied this condition. That is more than 40% of the residents support the increase, implies the option( C) is the correct answer.
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Six less than six times a number is the same as eight times the number. Find the number.
The number is
Answer:
below
Step-by-step explanation:
6x -6 = 8 x
-6 = 2x
x = -3
Answer:
X = -3
Step-by-step explanation:
Let's slowly create an equation
Six less than six times a number = eight times the number
if x = that number...
Six less than six times of x = eight times of x
6 less than 6 times of x is 6x-6
8 times x is simply 8x
So 6x - 6 = 8x
We can rearrange this equation by adding 6 to one side and subtracting 8x from the other
6x - 8x = 6
Combining like terms makes it -2x = 6
Last step is dividing by -2, giving us x = -3
Select the correct answer. The sum of the digits of a three-digit number is 13. The tens digit, t, is 1 more than the hundreds digit, h. The units digit, u, is 3 more than the sum of the tens and hundreds digits. Which system of equations can be used to find each digit?
Could someone help me understand? im a but confused
Using the system of equations we get the values of 3 digit number as:
238
Given:
The sum of the digits of a three-digit number is 13.
The tens digit, t, is 1 more than the hundreds digit, h. The units digit, u, is 3 more than the sum of the tens and hundreds digits.
we are asked to determine each digit of the given number:
we frame the equation as:
tens digit (t) = 1+h
hundreds digit (h) = h
units digit (u) = 3+(t+h)
hence,
h + (1+h) + (3+(t+h)) = 13
open the brackets.
h+1+h+3+(t+h)=13
substitute t value from the above mentioned state.
h+1+h+3+((1+h)+h)=13
h+1+h+3+1+h+h=13
arrange the like terms and add.
4h + 5 = 13
4h = 13-5
4h=8
h = 8/4
h = 2
hence we get the hundreds digit as 2.
now substitute it to get t and u value.
t = 1+h
t = 1+2
t = 3
tens digit = 3
u = 3+(t+h)
u = 3+(3+2)
u = 3+5
u = 8
units digit = 8
A=1/2h (b1 + b2) for h
If X and Y are independent exponential random variables with pdf f(x) = 0.5e-as, x 0, find p(X > 1,Y > 4)
The joint probability distribution function for exponential random variables with pdf f(x) = 0.5e^(-0.5x), x ≥ 0, find P(X > 1,Y > 4) is, e^(-5/2).
The X and Y are independent variables, so probability distribution function of X is same as that of Y.
The joint probability distribution function for independent variables is,
[tex]\int \int f(x)f(y) dx dy[/tex]
where f(x) and (y) are the probability distribution function in x and y respectively.
In this question, X>1 and Y>4, so the limits of integration for X goes from 1 to infinity and for Y it goes from 4 to infinity.
[tex]\int_4^\infty \int_1^\infty 0.5 \times 0.5 \times e^{-0.5x} e^{-0.5y} dx dy\\= 0.25\int_4^\infty e^{-0.5y} dy \int_1^\infty e^{-0.5x} dx\\= 0.25 \times [-2e^{-0.5y}]_4^\infty \times [-2e^{-0.5x}]_1^\infty \\= 0.25 \times \dfrac{2}{{e}^2} \times \dfrac{2}{\sqrt{e}}[/tex]
The integral is, e^(-5/2).
The joint probability distribution function is, e^(-5/2).
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--The complete question is, If X and Y are independent exponential random variables with pdf f(x) = 0.5e^(-0.5x), x ≥ 0, find P(X > 1,Y > 4).--
A baseball diamond measures 28 meters along each side. If a batter hit 1 single in a game, how many kilometers did the batter run?
The batter ran a distance of 0.112 kilometers or approximately 112 meters.
What is the distance?A mathematical number known as distance measures "how much ground an object has traveled" while moving. Distance is defined as the product of speed and time.
A baseball diamond is made up of four bases, and the distance a batter runs for a single is from home plate to first base, then first base to second base, then second base to third base, and finally third base back to home plate.
So the total distance the batter runs is 4 times the distance from home plate to first base, which is 28 meters.
28 meters x 4 = 112 meters
To convert meters to kilometers, divide by 1000:
112 meters / 1000 = 0.112 kilometers
Thus, the batter ran 0.112 kilometers or approximately 112 meters.
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Help! I will be very grateful if you help, 25 points
Therefore , the solution of the given problem of linear equation comes out to be total amount collected is $4956.
What is a linear equation, exactly?The foundation for a linear regression curve is the equation y=mx+b. B is the slope, and m is the y-intercept. The previous sentence is sometimes referred as a "mathematical equation involving two variables," even though that y or y are separate components. Two variables make up bivariate linear equations. There are no known solutions to application issues involving linear equations. Y=mx+b is the equation for a single set of equations.
Here,
Given :
Pupil : price per ticket is $8
teacher : price per ticket is $20
Thus ,
Let the x be the total amount of teacher is :
So,
Pupil collected 416$ more than teachers total amount is :
Pupil total amount = 416 + x
So,
Total tickets sold is 1/4 of the ticket sold :
=> 1/4y * 20 = x
=> 5 = x/y
=>x = 5y
So,
=> 416 + 5y = 3/4 * 8 y
=> 416 + 5y = 6y
=> y = 516 tickets were sold
Thus ,
=> 1/4 * 516 = 129
=> 129 * 20 = 2580
For pupil is :
=> (516 -219) * 8
=> 2376
Total amount collected is => 2580 + 2376 = 4956
Therefore , the solution of the given problem of linear equation comes out to be total amount collected is $4956.
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Help! I have to go to the park and park in the park and park on the park
Answer:
Please type or attach a math question to be answered.
Answer:
About extravagance philosophy
Carmen is starting a small gardening and lawn care business in her neighborhood for the summer. To get the business started she spends some money on advertising. The table shows her weekly profit for the first few weeks of the summer.
Week Profit ($)
1 −44.50
2 −26.25
3 80.50
4 88.75
5 95.50
Based on the average profit per week, how much total profit can she expect to earn over the course of the 12-week summer break?
On average Carmen earned $38.8 per week of profit and for 12 weeks the profit earned is $465.6.
What is average?
In everyday terms, an average is one number chosen to represent a list of numbers; it is often the sum of the numbers divided by the number of numbers in the list (the arithmetic mean).
The profit earned by Carmen in her first week = -$44.50
The profit earned by Carmen in her second week = -$26.25
The profit earned by Carmen in her third week = $80.50
The profit earned by Carmen in her fourth week = $88.75
The profit earned by Carmen in her fifth week = $95.50
The average profit earned by Carmen is = sum of profit earned / number of weeks profit earned
Substitute the values into the equation -
Average = [(-44.50) + (-26.25) + 80.50 + 88.75 + 95.50] / 5
Average = 194/5
Average = 38.8
The avearge profit per week is $38.8
To find the profit Earned by Carmen in 12 weeks use the arithmetic operation of multiplication -
Profit Earned = 12 × Average profit per week
Substitute the values in the equation -
Profit Earned = 12 × 38.8
Profit Earned = 465.6
Therefore, the profit earned is $465.6.
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Answer:465.6
Step-by-step explanation:
Determine the value of h such that the matrix is the augmented matrix of a consistent linear system.
6 -3 h
-12 6 4
The value of h such that the matrix is the augmented matrix of a consistent linear system is -2
How to determine the value of hFrom the question, we have the following parameters that can be used in our computation:
6 -3 h
-12 6 4
For a consistent system of linear equation, the equations are the equivalent
So, we have
6x - 3y = h
-12x + 6y = 4
Divide the second equation by -2
6x - 3y = -2
By comparing the equations, we have
h = -2
Hence, the solution of h is -2
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What is the zero in the equation y=2x+8?
Answer:
The zero in the equation y = 2x + 8 is when x = -4. When x = -4, y = 0.
A polygon has two pairs of complementary interior angles in three sets of supplementary interior angles. The sum of the remaining interior angles is 1440°. How many sides does a polygon have? Explain 
Which graph represents the equation y equals one half times x minus 1?
Step-by-step explanation:
The graph would represent a straight line that slopes downwards and passes through the point (2,1).
Please I need help , thanks
The statements that are true on the graph include:
The point ( -8, 9 ) lies on the line The point ( 0, 4 ) lies on the line The point ( 4, 0 ) lies on the line What points lie on the line ?At the point where the line hits x = 4, the y coordinates would be 0. This means that the point ( 4, 0 ) lies on the line. The point where the line crosses x = 0, y is the value of 4 which means that ( 0, 4 ) lies on the line.
The point ( - 8, 9 ) also lies on the line because as the line extends upwards, it would intersect the point ( - 8, 9 ).
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Sweeten Company had no jobs in progress at the beginning of March and no beginning inventories. The company has two manufacturing departments—Molding and Fabrication. It started, completed, and sold only two jobs during March—Job P and Job Q. The following additional information is available for the company as a whole and for Jobs P and Q (all data and questions relate to the month of March):
Molding Fabrication Total
Estimated total machine-hours used 4,200 2,520 6,720
Estimated total fixed manufacturing overhead $ 16,800 $ 25,200 $ 42,000
Estimated variable manufacturing overhead per machine-hour $ 1.40 $ 2.20
Job P Job Q
Direct materials $ 21,840 $ 13,440
Direct labor cost $ 35,280 $ 12,600
Actual machine-hours used:
Molding 2,890 1,340
Fabrication 1,010 1,480
Total 3,900 2,820
Sweeten Company had no underapplied or overapplied manufacturing overhead costs during the month.
4. What was the total manufacturing cost assigned to Job P? (Do not round intermediate calculations.)
The total manufacturing cost assigned to Job P is $84,240.
How to compute the total manufacturing cost:The total manufacturing cost consists of direct material, direct labor, variable overhead, and fixed overhead costs.
The variable manufacturing costs include direct materials, direct labor, and variable overhead while the fixed overhead costs are period costs related to the production process.
Molding Fabrication Total
Machine hours used 4,200 2,520 6,720
Fixed manufacturing overhead $16,800 $25,200 $ 42,000
Fixed manufacturing overhead per hr $4 $10
Variable manufacturing overhead
per machine-hour $ 1.40 $ 2.20
Job P Job Q
Direct materials $ 21,840 $ 13,440
Direct labor cost $ 35,280 $ 12,600
Actual machine hours used:
Molding 2,890 1,340
Fabrication 1,010 1,480
Total 3,900 2,820
Actual Manufacturing Costs (Job P):
Job P
Direct materials $21,840
Direct labor costs $35,280
Overheads:
Variable $5,460 (3,900 x $1.40)
Fixed:
Molding = $11,560 ($4 x 2,890)
Fabrication = $10,100 ($10 x 1,010) $21,660
Total manufacturing costs $84,240
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A seventh-grade teacher asks her students a survey question. Which questions are appropriate for the teacher to ask her population?
The questions that are appropriate for the teacher to ask her population are:
How many hours of sleep do you get per night?
On average, how long does it take you to complete your homework?
What time do you leave for school in the morning?
What is Statistics?Statistics is the discipline that concerns the collection, organization, analysis, interpretation, and presentation of data.
The survey is conducted among the seventh grade students so the valid question their teacher would have asked them is:
How many hours of sleep do you get per night?
On average, how long does it take you to complete your homework?
What time do you leave for school in the morning?
while the other two questions are invalid as it the students are young and they are not legal to vote also it is not necessary that they would arrive to school by car.
Hence, the questions that are appropriate for the teacher to ask her population are:
How many hours of sleep do you get per night?
On average, how long does it take you to complete your homework?
What time do you leave for school in the morning?
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I'm giving out 50 points for this riddle: if a homeless eats it, he dies, rich people need this, and some people already have this that are poor
Answer:
nothing
Step-by-step explanation:
Answer:
Step-by-step explanation:
nothing
What is the critical F value for a sample of six observations in the numerator and four in the denominator? Use a two-tailed test and the .10 significance level., Mark Nagy has averaged 9 rejects, with a standard deviation of 2 rejects per day. Debbie Richmond averaged 8.5 rejects, with a standard deviation of 1.5 rejects, over the same period. At the .05 significance level, can we conclude that there is more variation in the number of rejects per day attributed to Mark?
The critical F value for a sample of 6 and 4 degrees of freedom at a .10 two-tailed significance level can be found using a F-distribution table. The exact value depends on the specific table used.
How do we compare Mark and Debbie?For the comparison between Mark and Debbie, we would need to perform an F-test for equality of variances to determine if there is more variation in Mark's data. The null hypothesis is that the variances are equal, and the alternative hypothesis is that the variance of Mark's data is greater. The test statistic would be the ratio of the larger variance to the smaller variance, with the degrees of freedom being the smaller of the two sample sizes minus 1.
A .05 significance level means that we reject the null hypothesis if the p-value is less than .05. The p-value can be found using an F-distribution table or a statistical software.
The conclusion would depend on whether the p-value is less than .05 or not.
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