1. Page 348: Consider the experiment and the data given in Table 9.11.

1. Use SAS to test for normality for "standard cuff" and then for "random zero". If either of these two variables is non-normal at alpha=0.05, then a nonparametric test would be better.
2. Use the sign test at alpha=0.05. Use hand calculations, followed by SAS. Note that the sample size may be too small for the normal approximation. Give the p-value for the test.
3. Use the normal approximation. Compare results with what you got in (b).
4. Use the signed rank test at alpha=0.05. Use hand calculations, followed by SAS. Note that the sample size may be too small for the normal approximation. Give the p-value for the test.
5. Use the normal approximation. Compare results with what you got in (d).
6. Using SAS only, run proc univariate to use the t test. Compare your results with your results in (b) and (d).

2. Consider the data in SMOKE.DAT for problem 9.29, comparing the two age groups.

1. Using SAS, test for normality of each sample.
2. Using hand calculations, use the Rank Sum Test. Give the p-value for the etst. Then use SAS.
3. Use SAS for the two sample t test in proc ttest. Compare your results with part (b).

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