26)A sampling distribution is the probability distribution of _____.

A) a sample

B) a sample statistic

C) an observation that is randomly selected from the population

D) a population parameter

27)Suppose you randomly select a sample of 16 observations from a population with=8

and=2

You findx=9

. The sampling error is _____.

A) -0.5

B) 0.5

C) -1

D) 1

30)Consider a population with 3 observations: 6, 10 and 12. You use simple random sampling without replacement to select a sample of 2 observations. What is the standard deviation of the sample mean?

A)1

B)1.25

C)1.56

D)1.6

31)What is the standard error of the mean?

A)The population standard deviation divided byn

B)The standard deviation of the sampling distribution ofx

C)Another term for the sample standard deviation

D)The difference between the sample mean and population mean

32)What must be true so that the sampling distribution ofx

follows the normal distribution?

A)The sample size must be greater than 30.

B)The population distribution must be normal.

C)Either

D)Both