Standardized test Something Great/tutorialoutletdotcom Test Z is a standardized test that all high school | Page 4

Group
Treatment (x)
Control (y) Sample size
30
25 Sample mean
76
70 σ
10
9 Determine whether or not these results provide evidence that mean
test scores are different for
the two populations. Here are the null and alternative hypotheses: A)
B)
C)
D) H0: μx = μy
H1: μx ≠ μy
You would _____ the null hypothesis at 10% significance level. You
would _____ the null
hypothesis at the 1% significance level.
reject, reject
reject, fail to reject
fail to reject, reject
fail to reject, fail to reject 5. A)
B)
C)