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? Security Service Company: 31.8 1.4 1.7 1.4 1.5 16 1.3 1.3 1.5 p 1.6 Other Companies: 1.5 1.8 1.7 1.9 1.7 1.9 1.5 1.7 1.9 Find the coefficient of variation for each of the two samples, then compare the variation. The coefficient of variation for the amount collected by the security service company is (Round to one decimal place as needed.) %.

Explanation / Answer

For Security service company

mean = 1.48
Std.deviation = 0.1751

Coefficient of variation = sd/mean
= 0.1751/1.48
= 0.1183 = 11.83%

For other companies

mean = 1.72
Std.deviation = 0.1549

Coefficient of variation = sd/mean
= 0.1549/1.72
= 0.0901 = 9.01%

The security service company has higher variation than other companies

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