4 5 8 7 5 6 7 3 5 6
6 7 9 7 7 7 9 5 4 7
8 9 10 9 9 7 10 6 7 9
9 9 10 10 8 9 11 7 7 10
Bonferroni adjustments are necessary when making multiple comparisons because they keep the Type I error rate from being inflated.

True. The Bonferroni adjustment is designed to keep alpha at the same level by reducing the critical value for each comparison. If each comparison had a critical value of 0.05, then the chance of making one or more Type I errors would be higher than 0.05. The Bonferroni adjustment corrects for this.
true
True
false
False
You plan to test all pairwise comparisons among 4 means. What is the critical value after a Bonferroni adjustment needed to maintain an experiment-wise Type I error rate of 0.05?

6 comparisons .05/6 = 0.00833
0.0083
0.0005
Calculate t for the comparison of the mean for CA with the mean for CB.

0
3.67
0.01
no
t = 3.674
Calculate p for the comparison of CC to CD.

0
.051
0.001
t(9) = 2.25, p = .0510