Listed below are amounts (in millions of dollars) collected from parking meters

Question

Listed below are amounts (in millions of dollars) collected from parking meters by a security service company and other companies during similar time periods. Do the limited data listed here show evidence of stealing by the security service company’s employees? Find the coefficient of variation for each of the two samples, then compare the variation. Test: Test #1 (Chp. 1 -Chp. 3) 32 of 65 Security Service Company Round to one decimal place as needed) difference in the varation OD. There is a sigificant dference in the variation.

Explanation / Answer

The statistical software output for this problem is:

Summary statistics:

Hence,

Coefficient of variation for Security Service Company = 9.3 %

Coefficient of variation for other companies = 7.7 %

Option A is correct.

Column Coef. of var. Security Service Company 9.3400606 Other Companies 7.7371794

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