Research is conducted\'regarding the average age at retirement for four career g

Question

Research is conducted'regarding the average age at retirement for four career groups. To test whether there is a relationship between age of retirement and career in these groups, 700 employees, recently retired, are randomly selected. The resulting data are displayed in the contingency table below. Age at Retirem ent 50-55 56-60 61-65 Over 65 Total 165 175 Attorn ey 10 40 75 40 Career College 30 80 60 Professor Secretary Store Clerk 18 Total 63 70 159288 178 182 700 21 49 50 199 45 54 How many degrees of freedom are there for the chi-square test statistic? Select one: a. 12 o b. 9 O c. 25 d. 16 e. 4

Explanation / Answer

Here no of rows = 4

No of columns = 4

Degree of freedom will be = (4-1)*(4-1) = 9

Option B is Correct

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