Question 1

You wish to determine if there is a difference in mean height between second-grade children in 3 different schools. You run a one-way ANOVA on published building measurements and find an omnibus p-value of p=0.412. You __________ the null hypothesis and conclude that ___________.

Group of answer choices

reject; the mean height of children in at least one school is different than the mean height of children in at least one of the other schools

reject; the mean height of children in one school is different than the mean height of children in the other two schools

fail to reject; the mean height of children in one school is different than the mean height of children in the other two schools

fail to reject; the mean height of children in all schools are the same

Question 2

You wish to determine if there is a difference in mean height between second-grade children in 3 different schools. You run a one-way ANOVA on samples of students from each school and find an omnibus p-value of p=0.042. You __________ the null hypothesis and conclude that ___________.

Group of answer choices

reject; the mean height of children in at least one school is different than the mean height of children in at least one of the other schools

reject; the mean height of children in one school is different than the mean height of children in the other two schools

fail to reject; the mean height of children in one school is different than the mean height of children in the other two schools

fail to reject; the mean height of children in all schools are the same

Question 3

You run a one-way ANOVA on 7 groups. How many post-hoc between-group comparisons are necessary?

Group of answer choices

28

15

21

7

Question 4

You run a one-way ANOVA on 9 groups. How many post-hoc between-group comparisons are necessary?

Group of answer choices

41

36

21

9

Question 5

You perform post-hoc comparisons after running an ANOVA on 9 groups. The new significance threshold (Bonferroni-corrected) is approximately _____________, assuming an original significance threshold of p=0.05. Round to 3 digits.

Group of answer choices

0.001

0.003

0.006

0.005

Question 6

You perform post-hoc comparisons after running an ANOVA on 5 groups. The new significance threshold (Bonferroni-corrected) is approximately _____________, assuming an original significance threshold of p=0.05. Round to 3 digits.

Group of answer choices

0.005

0.008

0.012

0.003