Suppose simple random samples of size 75 were selected from a ...

[renzo156]

  Suppose simple random samples of size 75 were selected from a population with a mean of 56 and a variance of 12. What are the mean and standard deviation of the sampling distribution of the sample mean?
 

  a. and
  b. and
  c. and
  d. and

Question 2

  When is the following z-score formula used, ?
 

  a.It gives the z-score when dealing with a sample mean.
  b.It gives the z-score when dealing with individual values from a normal distribution.
  c.It gives the z-score when the sample mean is equal to the population mean.
  d.It gives the z-score when the standard error of the mean is equal to the population variance.

[randomguy133]

Answer to Question 1

correct: a

Answer to Question 2

correct: b