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   Other_Companies
1.5   1.7
1.6   1.8
1.4   1.6
1.6   1.9
1.5   1.7
1.5   1.9
1.6   1.6
1.8   1.5
1.5   1.7
1.7   1.6

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

nothing​%.

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

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 significant difference in the variation.

B.

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

C.

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

D.

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

Answer 1

Ans:

	Security	Other
1	1.5	1.7
2	1.6	1.8
3	1.4	1.6
4	1.6	1.9
5	1.5	1.7
6	1.5	1.9
7	1.6	1.6
8	1.8	1.5
9	1.5	1.7
10	1.7	1.6
mean	1.57	1.7
std. dev=	0.1160	0.1333
Cov.=	7.4	7.8

The coefficient of variation for the amount collected by the security service company is=7.4%

The coefficient of variation for the amount collected by the other companies is=7.8%

No. There is a not significant difference in the variation