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:Security Service Company:	1.31.3	1.81.8	1.51.5	1.41.4	1.51.5	1.41.4	1.71.7	1.61.6	1.31.3	1.61.6
Other Companies:Other Companies:	1.61.6	1.91.9	1.71.7	1.71.7	1.81.8	1.81.8	1.61.6	1.51.5	1.71.7	1.61.6

Find the coefficient of variation for each of the two​ samples, then compare the variation.

1.The coefficient of variation for the amount collected by the security service company is

nothing​%.

​(Round to one decimal place as​ needed.)

2.The coefficient of variation for the amount collected by the other companies is

nothing​%.

​(Round to one decimal place as​ needed.)

Do the limited data listed here show evidence of stealing by the security service​ company's employees? Consider a difference of greater than​ 1% to be significant.

A.

No. There is a not significant difference in the variation.No. There is a not significant difference in the variation.

B.

Yes. There is a significant difference in the variation.Yes. There is a significant difference in the variation.

C.

No. There is a significant difference in the variation.

D.

Yes. There is not a significant difference in the variation.

Answer 1

from above:

1) coefficient of variation for the amount collected by the security service company is =11.0 %

2)coefficient of variation for the amount collected by the other companies is =7.1 %

3) option B : Yes. There is a significant difference in the variation.