Question 13

The American Milk Association is claiming that men drink more milk than women. If a sample of 45 men drink on average 26oz of milk a day with a standard deviation of 5oz. A sample of 40 women drink on average 24oz of milk a day with a standard deviation of 3oz. At the .10 significance level, can we conclude that men drink more milk than women? What are the null and alternative hypothesis?

Group of answer choices

C. Ho: M = W H1: M not= W

B. Ho: M <= W H1: M >W

D. Ho: M > W H1: M not= W

A. Ho: M >= W H1: M

Question 14

What can you conclude about the relationship between Burn Temperature and Mass if the correlation is -.5999?

Group of answer choices

D. Moderate Direct Relationship

B. Moderate Inverse Relationship

C. No Relationship

A. Strong Direct Relationship

Question 15

The students at DCCC was asked how many hours they study in a given week.

The data showed that a sample of 55 men showed they studied on average 9 hours per week with a standard deviation of 3 hours.

A sample of 50 women showed they studied on average 10 hours per week with a standard deviation of 2 hours.

Can you prove the claim that men studied less hours than women in a given week? Use a significance level of .05. (Use z or t of -3.22)

What are the null and alternative hypotheses?

Group of answer choices

Ho: M >= W

HI: M < W

Ho: M = W

HI: M W

Ho: M > W

HI: M W

Ho: M <= M

HI: M > W

Question 16

A computer manufacturer is about to unveil a new, faster personal computer. The new machine clearly is faster, but initial tests indicate there is more variation in the processing time. The processing time depends on the particular program being run, the amount of input data, and the amount of output.

A sample of 16 computer runs for the new machine and 16 computer runs for the old machine, covering a range of production jobs, showed that the standard deviation of the processing time was 22 hundredths of a second for the new machine and 12 hundredths of a second for the current machine.

At the .05 significance level can we conclude there is more variation in the processing time of the new machine? (Use F value of 3.36)

What can you conclude?

Group of answer choices

B. Reject Ho. There is more variation in processing time of the new machine.

C. Reject Ho. We cannot conclude that there is more variation in processing time of the new machine.

A. Do Not Reject Ho. There is more variation in processing time of the new machine.

D. Do Not Reject Ho. We cannot conclude that there is more variation in processing time of the new machine.