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What is the standard of...

What is the standard of error of the mean for samples of size 100 taken from a population whose standard deviation is 3.78?

A. 0.378

B. 3.78

C. 37.8

D. 378

The population of all those who took the SAT math test has a mean of 500. What is the mean of the distribution of all samples of size 100 from this population?

A. Greater than 500

B. Exactly 500

C. Less than 500

D. It is impossible to tell from this info.

Did you see this one? Did you answer it or am I missing it?

Which sample has the best chance of being representative of a certain population of psychiatrists in a certain state?

A. Volunteers, N=20

B. Volunteers, N=500

C. Randomly drawn, N=20

D. Randomly drawn, N=500

A. 0.378

B. 3.78

C. 37.8

D. 378

The population of all those who took the SAT math test has a mean of 500. What is the mean of the distribution of all samples of size 100 from this population?

A. Greater than 500

B. Exactly 500

C. Less than 500

D. It is impossible to tell from this info.

Did you see this one? Did you answer it or am I missing it?

Which sample has the best chance of being representative of a certain population of psychiatrists in a certain state?

A. Volunteers, N=20

B. Volunteers, N=500

C. Randomly drawn, N=20

D. Randomly drawn, N=500

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