Problem 1: The same group of people rated both brands of coffee. Half of the subjects tasted brand A first. Half of the subjects tasted brand B first.

Subject. coffee a. coffee b

1 8 6

2 8 7

3 6 7

4 7 5

5 6 5

6 8 7

7 8 8

8 5 6

9 8 7

10 6 5

Is there a difference in the mean ratings between the two brands of coffee (use an alpha .05)?

You must use all five steps in hypothesis testing:

Restate the question as a research hypothesis and a null hypothesis about the populations.

Determine the characteristics of the comparison distribution.

Determine the cutoff sample score on the comparison distribution at which the null hypothesis should be rejected.

Determine your sample's score on the comparison distribution.

Decide whether to reject the null hypothesis.

Procter and Gambling are testing a new toothpaste. A sample of 400 individuals participated in the taste test and 80 indicated they like the taste. Conduct a hypothesis test to determine if at least 22% of the population will like the new toothpaste. What is the null and alternative hypothesis? ONone OHO : p 0. 22 OHO : p 0. 22 OHO : p > 0. 22 and H1 : p