Question

Question 5

A restaurant manager is considering changing the secret sauce on their hamburgers. To decide which recipe to use, she recruits 15 customers and assigns 5 different customers to each of the 3 sauce groups (A, B, or C). She then serves them a plain hamburger with the sauce for their group and asks them to rate their satisfaction with the taste of the sauce on a scale from 1 (disgusting) to 5 (delicious) to see if there is a significant (α = .05) difference in taste. Based on the data and results you calculated, calculate Tukey's HSD and determine which pairs of groups are significantly different?

A B C
1 3 3
2 4 5
1 2 4
3 1 3
2 2 5

Group of answer choices

Group A and Group B are significantly different.

Group A and Group C are significantly different.

Group B and Group C are significantly different.

Group C is significantly different from Group A and Group B.

All of the Groups are significantly different.

None of the Groups are significantly different.

Question 6

Under what circumstances are post-hoc analyses necessary for a one-way ANOVA?

Group of answer choices

When you reject the null hypothesis with exactly two treatment conditions.

When you fail to reject the null hypothesis with more than two treatment conditions.

When you reject the null hypothesis with more than two treatment conditions.

When you fail to reject the null hypothesis with exactly two treatment conditions.

Question 7

If the null hypothesis is true and there is no treatment effect, what value is expected on average for the F-ratio?

Group of answer choices

0

k - 1

N - k

1

Question 8

Which combination of factors is most likely to produce a large value for the F-ratio?

Group of answer choices

small differences between groups and very different scores within groups

large differences between groups and very different scores within groups

large differences between groups and similar scores within groups

small differences between groups and similar scores within groups

Answer 1