ECO 361 Social Statistics Tracey Osborn & 1/27/18 5:05 PM Myj i Homework Assignm

ID: 3353601 • Letter: E

Question

ECO 361 Social Statistics Tracey Osborn & 1/27/18 5:05 PM Myj i Homework Assignment 2: Chapters 3 and 5 (Due Sunday, 1/28) Save Score: 0 of 5 pts 3) 3.2.22 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 2 of 19 (17 complete) HW Score: 77%, 77 of 100 pts EQuestion Help limited data listed here show evidence of stealing by the security service company's employees? Security Service Company Other Companies 1.3 1.7 1.6 1.7 1.3 16 1.5 1.5 17 1.8 16 19 17 16 18 1.6 Find the coefficient of variation for each of the two samples, then compare the variation The coettaent of variation tor the amount collected by the security service company is 106 % (Round to one decimal place as needed ) The coefficient of variation for the amount collected by the other compan es s 7,1 % (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 stion 4 (5/5) O A. No There is a not significant difference in the variation O B. No. There is a significant difference in the wariation dC. Yes. There is not a significant difference in the variation estion 16 (6/6) D. Yes There is a significant difference in the variation Click to select your answer and then click Check Answe All parts showing Check Answer Clear All ^ O Type here to search

Explanation / Answer

Result:

Descriptive statistics

security service

others

mean

1.550

1.720

sample standard deviation

0.165

0.123

sample variance

0.027

0.015

minimum

1.3

1.6

maximum

1.8

1.9

range

0.5

0.3

skewness

-0.278

0.431

kurtosis

-0.580

-1.461

coefficient of variation (CV)

10.6%

7.1%

Coefficient of variation for security company = 10.6

Coefficient of variation for others = 7.1

D. Yes there is significant difference in the variation.