1) If a population has a mean of 100 and standard deviation of the mean of 4, wh

Question

1) If a population has a mean of 100 and standard deviation of the mean of 4, what is the variance of the sampling distribution for N=50?

A) 0.32

B) 0.5

C) 1

D) 32

2) What is the standard error of the mean for a set of data with sample variance of 25 and sample size of 225?

A) 0.5

B) 1.333

C) 25

D) 0.333

What do we call the frequency distribution of a statistic?

A) sampling bias

B) sampling distribution

C) normalized distribution

D) validated distribution

IQ is normally distributed in the population with a mean of 100 and a standard deviation of 15. What is the standard error of the mean for a sample of 25 people?

A) 15

B) 5

C) 3

D) 20

Explanation / Answer

1.

Mean = 100
Stdev = 4
Varinace of sampling distribution for N=50 is = 4^2 / 50 = .32

4)

Mean = 100

Stdev = 15

Stde error for sample of 25 people = Stdev/sqrt(25) = 15/5 = 3

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