4. A researcher wishes to see if there a difference in the cholesterol levels of two groups s of men. A random sample of 30 men between the ages of 25 and 40 is selected and tested. The average level is 223 with the standard deviation is 6. A second sample of 42 men between the ages of 41 and 56 is selected and tested. The average of this group is 229 with the standard deviation is 8. Assume that both variables are approximately normally distributed. a. What is the point estimate of the mean differences of the cholesterol levels?" Point estimate; 1st sample: 223/30 =7.43 an b. Find the 95% confidence interval for the difference of the two means. (Type your answer in this format: Margin error = _x_ : 95% CI = Your answer c. Based on answer in (a), is there a difference in the cholesterol levels between the two groups at 5% significance level? Justify your answer. Your answ

4. A researcher wishes to see if there a difference in the cholesterol levels of two groups s of men. A random sample of 30 men between the ages of 25 and 40 is selected and tested. The average level is 223 with the standard deviation is 6. A second sample of 42 men between the ages of 41 and 56 is selected and tested. The average of this group is 229 with the standard deviation is 8. Assume that both variables are approximately normally distributed. a. What is the point estimate of the mean differences of the cholesterol levels?" Point estimate; 1st sample: 223/30 =7.43 an b. Find the 95% confidence interval for the difference of the two means. (Type your answer in this format: Margin error = _x_ : 95% CI = Your answer c. Based on answer in (a), is there a difference in the cholesterol levels between the two groups at 5% significance level? Justify your answer. Your answ

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

4. A researcher wishes to see if there a difference in the cholesterol levels of two
groups of men. A random sample of 30 men between the ages of 25 and 40 is
selected and tested. The average level is 223 with the standard deviation is 6. A
second sample of 42 men between the ages of 41 and 56 is selected and tested.
The average of this group is 229 with the standard deviation is 8. Assume that
both variables are approximately normally distributed.
a. What is the point estimate of the mean differences of the cholesterol levels?.
Point estimate; 1st sample: 223/30 =7.43 an
b. Find the 95% confidence interval for the difference of the two means. (Type
your answer in this format: Margin error = x_ =_;95% CI =
!3!
Your answer
c. Based on answer in (a), is there a difference in the cholesterol levels between
the two groups at 5% significance level? Justify your answer.
Your answer

10. A researcher wishes to test the claim that on average more juveniles than
adults are classified as missing persons. Records for the last five years are shown
and the results are given in the output.
Juveniles: 65,513; 65,934; 64,213; 61,954; 59,167
Adults: 31,364; 34,478; 36,937; 35,946; 38,209
At alpha = 0.10 is there enough evidence to support the claim? (Use P value
method and provide all steps needed)*
%D
Your answer

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