Bonferonni adjustments are necessary when making the multiple comparisons to avoid inflating the type I error rate.

True. the Bonferonni adjustment is designed to control the type I error rate by reducing the the critical p-value for all comparisons.
true
True
false
False
You plan to test all pairwise comparisons among 4 means. What is the new critical p value after a Bonferonni adjustment to maintain an experiment-wise alpha of .05.

6 comparisons .05/6 = 0.00833
0.0083
0.0005
What coefficients would be used to compare Group 1 to the average of Groups 2-4?

false
1, 1, 1, 1
true
1, -.333, -.333, -.333
false
1, -.5, -.5, -.5
1, -.333, -.333, -.333 because the -.333's result in the average of Groups 2-4.
In an experiment with three conditons, the means are 2, 4, and 9. What would be the value of L for the coefficients 2, -1, -1?

-9
.0001
(2)(2) + (-1)(4) + (-1)(9) = -9
Are the following two sets of coefficients are orthogonal? -1, 0, 0 1 and -1, 1, 0, 0

false
Yes
true
No
The sum of the products of the coefficients must be 0 for them to be orthogonal. For these coefficients (-1)(-1) + (0)(1) + (0)(0) +(1)(0)=1
In an experiment with three conditons and 5 subjects per condition, the means are 2, 4, and 9 and the MSE is 24. Find t for the coefficients 2, -1, -1?

1.677
.01
L = -9, sum of coefficients squared is 6, n is 5, MSE is 24 and t = 9/sqrt((6)(24)/5) = 1.677.