Finding Critical Regions [z-score cutoffs]

Sample: n=30

Avg Score: = 7.00

Standard Deviation: = 2.50

Data: 4, 7, 6, 10, 6, 3, 8, 1, 5, 3, 8, 2, 4, 9, 3, 9, 5, 8, 10, 6, 3, 4, 9, 10, 7, 5, 3, 5, 8, 4

If you decide to use an alpha level of .05, what is the z-score that you will use as a cutoff score for the hypothesis test?

If you decide to use an alpha level of .01, what is the z-score that you will use as a cutoff score for the hypothesis test?

If you decide to use an alpha level of .001, what is the z-score that you will use as a cutoff score for the hypothesis test?