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13) The expected value of...

13) The expected value of the sampling distribution of the sample mean equals the populations mean

A.

When the population is symmetric.

B.

When the population size N>30.

C.

When the population is normally distributed.

D.

For all populations.

14) For a sample size of 1, the sampling distribution of the mean will be normally distributed

A.

Only if the shape of the population is positively skewed.

B.

Only if the population values are larger than 30.

C.

Regardless of the shape of the population.

D.

Only if the population is normally distributed.

15) A random variable follows the Student’s t distribution. The probability that it will be positive is

A.

.05

B.

Less than 0.50

C.

1

D.

0

16) A pooled proportion estimate may be used to calculate the test statistic for a test of the equality of proportions when the

A.

sample sizes are small.

B.

samples are independently drawn from the populations.

C.

populations are normally distributed.

D.

nu

A.

When the population is symmetric.

B.

When the population size N>30.

C.

When the population is normally distributed.

D.

For all populations.

14) For a sample size of 1, the sampling distribution of the mean will be normally distributed

A.

Only if the shape of the population is positively skewed.

B.

Only if the population values are larger than 30.

C.

Regardless of the shape of the population.

D.

Only if the population is normally distributed.

15) A random variable follows the Student’s t distribution. The probability that it will be positive is

A.

.05

B.

Less than 0.50

C.

1

D.

0

16) A pooled proportion estimate may be used to calculate the test statistic for a test of the equality of proportions when the

A.

sample sizes are small.

B.

samples are independently drawn from the populations.

C.

populations are normally distributed.

D.

nu

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