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 Yes Smoker Heavy Moderate Nonsmoker Column total 6 13 34 No 6 32 Row Total 23 12 31 Expected counts are below observed counts Accident No Accident Total Heavy Moderate Nonsmoker Total 8 11.15 6 5.82 18 15.03 32 23 12 31 11.85 6 6.18 15.97 34 Chi-Sq = 2.88, DF = 2, P-Value = 0.237

Explanation / Answer

b)

c)

TS = 2.878

df = 2

critical value = 9.21

since TS< critical value , we fail to reject the null

0i 15 6 13 8 6 18 Ei 11.84848 6.181818 15.9697 11.15152 5.818182 15.0303 cell % 22.72727 9.090909 19.69697 12.12121 9.090909 27.27273 Row % 34.85 18.18 46.97 34.85 18.18 46.97 Coumn % 51.52 51.52 51.52 48.49 48.49 48.49

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