Question

9.12 (p541)

Consider the following 2x2 table:

Observed counts
	Explanatory variable
Response variable	1	2	Total
Yes	75	95	170
No	135	115	250
Total	210	210	420

a) You consider using the chi-square test to compare the two conditional distributions.

Find the expected values for the cells: (report as an integer)

Observed counts
	Explanatory variable
Response variable	1	2	Total
Yes	?	?	170
No	?	?	250
Total	210	210	420

b) Computer software give you X² = 3.95. What are the degrees of freedom? _________

c) What is the p-value? ____________

Answer 1