1. Smoking during pregnancy is a known cause of reduced infant birth weight and other issues that can affect the delivery and mortality. Despite this strong evidence, women who smoke find it difficult to quit even when they are pregnant. Suppose a study is done measuring the birth weight of babies of mothers who smoked during pregnancy and those who did not smoke. Use an alpha of 0.01. Use a non-parametric test. The birth weight of data in pounds are:

Smokers: 3.1, 4.2, 4.5, 5.0, 6.4, 4.7, 6.0

Nonsmokers: 5.5, 6.5, 7.1, 8.0, 6.8, 7.5, 6.2

1. State the null and alternative hypothesis.
2. Put this data into SPSS, and find the test statistic.
3. State the p-value and interpret. What does the p-value tell us in terms of the null hypothesis?
4. What can we conclude?
5. Graphically display your results in the appropriate graph for this non-parametric test. Interpret the graph.

2. Using the dataset Download Festival.sav (from Field textbook), perform the appropriate test in SPSS to see whether hygiene scores on day 1 differed from those on day 3. These hygiene scores are from men and women who attended three days of a rock music festival. Use alpha = 0.05.

1. Which test is appropriate and why?
2. State the null and alternative hypothesis.
3. Indicate the level of significance and determine the critical value
4. Find the test statistic.
5. State the p-value and interpret.
6. What does the p-value tell us in terms of the null hypothesis?
7. What can we conclude?
8. Give a 95% confidence interval and interpret.

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