In the book Business Research Methods (5th ed.), Donald R. Cooper and C. William

Question

In the book Business Research Methods (5th ed.), Donald R. Cooper and C. William Emory discuss studying the relationship between on-the-job accidents and smoking. Cooper and Emory describe the study as follows: Suppose a manager implementing a smoke-free workplace policy is interested in whether smoking affects worker accidents. Since the company has complete reports of on-the-job accidents, she draws a sample of names of workers who were involved in accidents during the last year. A similar sample from among workers who had no reported accidents in the last year is drawn. She interviews members of both groups to determine if they are smokers or not. The sample results are given in the following table On-the-Job Accident No Yes 13 Row Total 21 Nonsmoker Column total 16 34 15 32 31 Expected counts are below observed counts Total 21 Accident No Accident 13 10.82 10.18 7.21 16 15.97 34 6.79 15 15.03 32 Nonsmoker 31 Total Chi-Sq = 2.31, DF = 2, P-Value-0.315 (a) For each row and column total in the above table, find the corresponding row/column percentage. (Round your answers to 2 decimal places.) Row 1 Row 2 Row 3 Column 1 Column 2

Explanation / Answer

a.

Expected cell frequency forluma is

Eij=ri(Row total)*cj(Column Total/66.... where i = 1,2,3 and j=1,2

Smoker Yes No Row Total Heavy 13 8 21 Moderate 5 9 14 Nonsmoker 16 15 31 Column Total 34 32 66

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