If an economist wishes to determine whether there is evidence that average family income in a community equals $25,000

a three-tailed test should be utilized.

a two-tailed test should be utilized.

a one-tailed test should be utilized.

either a one-tailed or two-tailed test could be used with equivalent results.

2.Which of the following would be an appropriate null hypothesis?

The mean of a sample is equal to 55.

The mean of a population is equal to 55.

The mean of a population is greater than 55.

Only (a) and (c) are true.

3.A Type II error is committed when

we don't reject a null hypothesis that is false.

we reject a null hypothesis that is true.

we reject a null hypothesis that is false.

we don't reject a null hypothesis that is true.

4.If an economist wishes to determine whether there is evidence that average family income in a community exceeds $25,000,

either a one-tailed or two-tailed test could be used with equivalent results.

a two-tailed test should be utilized.

a one-tailed test should be utilized.

None of the above.