12.What is the standard error and the z value of the following scores:

=3, =48

A) n=16

B) n=36

13. Find the t values that form the boundaries of the critical region for a two-tailed test with = .05 for each of the following sample sizes:

a. n = 4

b. n = 15

c. n = 24

14. Find the X value that corresponds to each of the following scores.

= 92, =4

A. z= 1.50

B. z= 1.25

C. z= -0.50

D. z= -1.50

E. z= -2.00