A sampling distribution is a distribution of A. population data values
B. variances
C. data values from a single sample
D. sample means

the two may have that, even a breakdown is probably offered

2nd one in the first row is correct

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80