Question

can you help me

Answer 1

Investigators are interested in whether a new diet lowers total cholesterol in a group of individuals. They take a sample of 31 participants on the new diet. They know that the mean cholesterol level of the general population (µ) is 200 mg/dL, but they do not have information on the standard deviation of the population. The mean total cholesterol level in their sample of participants is 196 mg/dL and their sample has a standard deviation of 8 mg/dL.

Your research question of interest is:

Does the population of people on a new diet have a different mean cholesterol level than the general population?
You will use the information above for several of the following questions.



Which of the following represents the appropriate null hypothesis (H0), given this research question of interest?

Select one:
A. H0: µ ≠ 200
B. H0: µ = 200
C. H0: µ < 200
D. H0: µ = 196
E. H0: x̄ = 196

Answer 2

A

Answer 3

It's b my bad I read the answers wrong

Answer 4

then the alternative hypothesis is going to be
H1: µ ≠ 200

Answer 5

Which of the following represents the appropriate decision rule and critical values, testing at an alpha level (α) of 0.05.

Select one:
A. We will reject the null hypothesis at an alpha level of 0.05 if the calculated test statistic is more extreme than the critical values of -2.042 and 2.042.
B. We will reject the null hypothesis at an alpha level of 0.05 if the calculated test statistic is more extreme than the critical values of -2.129 and 2.129.
C. We will reject the null hypothesis at an alpha level of 0.05 if the calculated test statistic is more extreme than the critical values of -1.96 and 1.96.
D. We will reject the null hypothesis at an alpha level of 0.05 if the calculated test statistic is more extreme than the critical value of -2.692.
E. We will reject the null hypothesis at an alpha level of 0.05 if the calculated test statistic is more extreme than the critical values of 3.136.

Answer 6

I working on this hold on

Answer 7

There is a 5% probability of rejecting a true null hypothesis

Answer 8

so it is C then

Answer 9

@agent0smith

Answer 10

what class is this

Answer 11

Stats

Answer 12

Yes it's c

Answer 13

is c

Answer 14

It just checked, It wasn't c

Answer 15

@kropot72

Answer 16

Hold on lemme do this again and I'll see what I did wrong

Answer 17

Ok

Answer 18

D