Biostat. Homework ASAP

Note that I will not ask you to calculate the test statistic by hand in this chapter. Therefore, if the problem gives you a two-way table like the one in this lecture notes or lab and asks you to do a chi-square test, then this means that you need to type that table into SPSS and use SPSS to calculate the test statistic.

1. Exercise 2.123 (p. 147)

2. Exercise 2.124 (p. 147)

3. Exercise 2.125 (p. 147)

4. Exercise 2.127 (p. 147) For graphical summary, draw two bar graphs to show the conditional distribution on status. Specifically, draw one bar chart to show the age distribution for full-time students and another bar chart to show the age distribution for part-time students.

5. Exercise 9.23 (p. 538)

6. Exercise 9.44 (p. 542) Again for graphical summary of the data, make bar graphs to show the conditional distributions.

7. In a study of behavior asymmetries, 2391 women were asked which hand they preferred to use (for instance, to write) and which foot they preferred to use. The results are reported in the table:

		Preferred Hand
		Left	Right
Preferred Foot	Left	116	142
	Right	121	2012

(a) Suppose we want to test the null hypothesis that hand preference and foot preference are independent. Conduct an appropriate test using .

(b) Suppose we want to test the null hypothesis that right-handed women are equally likely to be right footed or left-footed. Conduct an appropriate test using .