Task:
“Does exercising regularly (three or more days per week) until you sweat and breathe hard appeal to you?” 90 boys and 80 girls responded to the question.
Responses
Boys
Girls
Total
Very much
40
11
51
( )
( )
Somewhat
40
30
70
Not at all
10
39
49
Totals
90
80
170
1. Determine what the expected frequencies would be for the two cells in the first row using the procedure from chapter 10, pages 190 to 195. Insert the answer between the parentheses in the two cells given in the preceding table. (show your work)
2. Use the formula from example 10.1 (p. 191) to calculate the part of the total chi square for the first cell (boys: very much). Place the answer here:.
3. The total chi square = 34.79. Consult table A.7 (p. 456) using the .01 alpha level to determine whether this is significant (you must determine the df for entering the table; see p. 191. Write the results of this test using APA style: ____________________________________________.
4. Using the percentages (converted from number of responses) as well as the previous chi-square analysis, interpret the reason for the significance by looking at the differences in the percentages for each type of response of the boys and the girls. Write a short paragraph using APA style to interpret this whole analysis.
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