1.The mean IQ score of a sample of 51 students selected from a high school is 97. Suppose the standard deviation of IQ's at this school is

= 6.8. The 99% confidence interval for the population mean (rounded to two decimal places) is:

The lower limit is

The upper limit is

2.For a two-tailed test, thep-value is:

A. the area in the tail under the sampling distribution curve beyond the observed value of the sample statistic

B. twice the area in the tail under the the sampling distribution curve beyond the observed value of the sample statistic

C. twice the area under the curve between the mean and the observed value of the sample statistic

D. the area under the curve between the mean and the observed value of the sample statistic

3. The following four steps must be taken to perform a hypothesis test using thep-value approach:

1.Calculate thep-value.

2.Select the distribution to use.

3.Make a decision.

4.State the null and alternative hypotheses and determine the significance level.

The correct order for performing these steps is:

2, 3, 1, 4

4, 1, 2, 3

3, 2, 1, 4

4, 2, 1, 3