A health psychologist knew that corporate executives in general have an average score of 2.55 with a standard deviation of 0.5 on a stress inventory and that the scores are normally distributed. In order to learn whether corporate executives who exercise regularly have different stress scores, the psychologist measured the stress of 30 exercising executives and found them to have a mean score of 2.76. a. Using the five steps of hypothesis testing, was the group of 30 exercising executives different from executives in general? (Use the .05 significance level.) Be sure to sketch the distributions involved. Be sure to fully state the five steps and show ALL calculations/work. b. Additionally, explain the logic of what you did to a person who understands hypothesis testing for studies in which the sample consists of a single individual but is unfamiliar with hypothesis testing involving a sample of more than one individual. (Be sure your explanation includes a discussion of the distribution of means--what it is, what it is made of, the concept of how it is created, how itʹs characteristics are created, its role in the overall hypothesis testing process.)
Answer:
Kindly check explanation
Step-by-step explanation:
Given the following :
Population mean (μ) = 2.55
Population standard deviation (σ) = 0.5
Sample size (n) = 30
Sample mean (x) = 2.76
α = 0.05
STEP 1:
Stress score in general executive (s1)
Stress score in exercising executive (s2)
Null : s1 = s2
Alternative : s1 < s2
STEP 2:
Shape of distribution = normal
Population mean (μ) = 2.55
Population standard deviation (σ) = 0.5
Sample size (n) = 30
Sample mean (x) = 2.76
α = 0.05
Decision rule :
α = 0.05 which corresponds to a t score (t0) ;
df = n - 1 = 30 - 1= 30 at 0.05 = 1.699
If :
(Test statistic (t) > t0) ; reject the Null
(right tailed test)
Test statistic (t) :
(x - μ) / (σ/√n)
(2.76 - 2.55) / (0.5/√30)
0.21 / 0.0913
= 2.30
t > t0
2.30 > 1.699
t is more extreme than t0
Hence, reject the null at α = 0.05
What is the equation for a line with slope = 3 that passes through point (2, 5)?
a. y = 3x - 13
b. y = 3x - 1
C. y = 3x - 5
A softball pitcher makes 48 pitches in the first 3 innings of a game. She will be pitching four more innings, at the most. The team's pitching coach
allows her to throw a maximum of 100 pitches per game. Write and solve an inequality to find the average number of pitches p she can make in
each of the next four innings
O A. 48 + < 100; p < 208
OB. 48 + 4p < 100; p < 13
O C. 48 + 100; p > 208
O D. 48 + 4p > 100; p > 13
Answer:
b
Step-by-step explanation:
can someone please answer
Answer:
It is B
Step-by-step explanation:
If you find the perimeters of each of the rectangles, you get 11x2, 15x2, and then 19x2
How did I get the x2?
All you have to do is add the length and width together, but it only gives half of the perimeter as there is another half at the other corner of the rectangle. The 11, 15, and 19 was from adding the 4s with the 7s. In the first rectangle, you do 7+4 equals 11, but you have to multiply it by 2, hence the first sentence at the beginning. Then you can find the slope, or the rate of change, as it increases by intervals of 8. The four that is added to every extra rectangle added to it is multiplied by 2, because there is another four at the other side of the rectangle. Then you can find the answer using process of elimination because B, is the only answer that the y-values increase by 8, while the x-values increase by 1, as the x values are counting how many rectangles are in each rectangle.
Hope this helps!
3x² + 2x + 2 + 4x² + 5 Simplify
Answer: 7x^2 + 2x + 7
Step-by-step explanation:
Combine likes terms that have alike variables and alike exponents.
(3x^2 + 4x^2) + (2x) + (2 + 5)
7x^2 + 2x + 7
guys whats 1 + 1?
im rly confused plz help
Serious Answer:
It's 2, you can use the calculator
Joke Answer:
Uhh it's 11 !
pls help rn if possible
Answer:
I would type these in Math-Way, then select Solve the system of equations (or inequalities, I forget which one). (4, -1, 0) would be the answer.
Which of the following steps would you use to
evaluate (a + b)??
Answer:
(a+b)(a+b)
Step-by-step explanation:
5/9 is rational or irrational
Solve for the unknown quantity of x
15/2= 60/x
Answer:
Directions: Write the name and composition of the following composer/s below. Space provided for your answer.
Which statement can be concluded using the true statements?
If a quadrilateral has 4 equal sides and 4 equal angles, then it is a square.
If a figure is a square, then each of its angles must measure 90 degrees.
If a quadrilaterál has 4 equal sides and 4 equal angles, then each of its angles must measure 90 degrees.
If a quadrilateral has 4 equal sides and 4 equal angles, then none of its angles measures 90 degrees.
If all four angles in a quadriateral measure 90 degrees, the quadrilateral is a square.
If all four angles in a quadriateral measure 90 degrees, the quadrilateral cannot be a square.
Answer:
A) If a quadrilateral has 4 equal sides and 4 equal angles, then each of its angles must measure 90 degrees.
Step-by-step explanation:
just did the unit review on edgenutiy 2020
hope this helps :)
Answer:
A) If a quadrilateral has 4 equal sides and 4 equal angles, then each of its angles must measure 90 degrees.
Hope it helps!! :)
The price of a stock decreased by 60 cents one week, decreased 10 cents the next week, and decreased another 20 cents the following week. What is the average change in the price of the stock over the three weeks?
Answer:
30 cents
Step-by-step explanation:
.60 + .10 + .20/ 3 = .09/3 = .30
Answer:
D
Step-by-step explanation:
Took the test ;)
solve for n
-53 + n = -28
Answer:
25
Step-by-step explanation:
-53 + n= -28
-53 + 53 + n = -28 + 53
n = 25
Answer: -81
Step-by-step explanation: -53 + n = -28
= n = -53/-28
= -81 as you should put the sign of the bigger no.
please mark as brainliest
it is math can someone help me, please
Answer:
Less than 3,
9/4
Step-by-step explanation:
7.5 more than the quotient of h and 3 is w
Answer: h/3 + 7.5 = w
What is the distance between point A and point B? Enter your answer in the box.
Answer:The distance between point a and point b is the number of units in between the 2 points
Step-by-step explanation:
At a certain location, the number of hours of sunlight is modeled by y = 6.4 cosine (StartFraction pi Over 26 EndFraction x) + 12 where x represents the number of weeks after the summer solstice.
Based on the model, what is the minimum number of hours of sunlight at this location?
3.2
5.6
6.4
13.0
Answer:
5.6
Step-by-step explanation:
Edge 2020
A correct option is an option (b)
Given,
The function is [tex]y=6.4 cos(\frac{\pi x}{26})+12[/tex]
For minimum hours of sunlight, [tex]cos(\frac{\pi x}{26})[/tex] should have the lowest value, that is -1 for [tex]x=26[/tex] {because [tex]cos (\pi )=-1[/tex] is the lowest value of cosine function}
Thus.
[tex]y_{minimum} = -6.4 + 12 \\y_{minimum}= 5.6[/tex]
So, the option is an option (b)
Learn more: https://brainly.com/question/18451626
How many 2/3 cup servings are in 6 cups of cereal?
giving brainliest
Answer:
its 4
Step-by-step explanation:
The merry-go-round at the fair rotates 12 times each minute, and children are 15 feet from the center of the wheel when they are in their seats. What is the linear velocity of the children in feet per hour?
360π
720π
21,600π
43,200π
Answer:
i think c 21600pi
Step-by-step explanation:
Answer:
C. 21600π
Step-by-step explanation:
1=12-w
Help solve please
10 times the quotient of 6 and 3
Answer:
20
Step-by-step explanation:
because first you do 6/3 because thats what quotient means which equals to 2 and then you do 10*2 which gives you 20
Solve for x 3x+wx=20
Answer:
X=[tex]\frac{20}{3+w}[/tex]
Step-by-step explanation:
We are to solve for x by factorizing the given expression
The value of x is [tex] \frac{20}{ 3 + w} [/tex]
Given:
3x + wx = 20
factorize
3x + wx = 20
x(3 + w) = 20
Divide both sides by 3+w
x = [tex] \frac{20}{ 3 + w} [/tex]
Read more:
https://brainly.com/question/16504783
Can someone help me with 14 and a few others I need help ):
Answer:
26, -0.85, 17
Step-by-step explanation:
hi! so for 14, you can plug in -11 for every x in the equation.
f(-11)= 15-(-11)
=15+11
=26
your answer is 26.
for 15, we can plug in 0.3 for x.
g(0.3)=-2.5(0.3)-0.1
= -0.75-0.1
= -0.85
your answer is -0.85.
for 16, you can plug in -17 for x.
f(-17)= -(-17)
=17
your answer is 17.
Answer:
14: 26
15: -8.5
16: 17
Step-by-step explanation:
The f(x) basically gives you what x is, as the inside of parenthesis means the value of x. You then can plug in x into the equation for each of the equations. Whenever you get something like 24- (-42) The negatives cancel out and you add the two values together instead.
Hope this helps!
can someone help me it is math
Answer:Its 1/6
Step-by-step explanation:
49×38= 4 × 39 × 8= 12/72= 12 ÷ 12/72 ÷ 12= 16
what is 1/11 divided by 4?(FRACTION FORM)
Answer: 1/44
Step-by-step explanation:
To find the quotient Three-fourths divided by one-eighth, multiply Four-thirds by One-eighth. multiply Three-fourths by 8. multiply Four-thirds by 8. multiply Three-fourths by One-eighth.
Answer:
multiply Three-fourths by 8.
Step-by-step explanation:
Answer: B multiply Three-fourths by 8.
Step-by-step explanation:
At which value in the domain does f(x) = 0?
X=-3
X=0
X=1
X=4
A die is thrown. What is the probability of getting 6?
(a) 0
b 1/6
c 1/2
d 1
Answer:
1/6
Step-by-step explanation:
There are 6 sides on a die, labeled 1,2,3,4,5,6
P(6) = number of 6's / total numbers
= 1/6
PLSS HELPP
What is the value of x in this equation?
4x − 2(2x − 2) = 2(2x − 4)
2, 4/3, 8/9, 16/27 whats next ?
Answer:
32/81
Step-by-step explanation: multiply the numerator by 2 and the denominator by 3.
Answer:
32/81
Step-by-step explanation:
Each term in the sequence is 2/3 of the previous one. Following that same pattern, the next term is 2/3 of the last one.
16/27 × 2/3 = 32/81
