Given Samples A and B below,

Sample A:	4.3	2.8	2.2	2.7	4.8	4.8	2.1	2.7	4.5
Sample B:	4.1	3.5	2.5	2.9	4.2	2.0	3.9	2.3	4.7

a. Calculate the mean and standard deviation for each sample.

Sample A: xA=xA=

;sA=;sA=

Sample B: xB=xB=

;sB=;sB=

Round to two decimal places if necessary

b. Calculate the coefficient of variation for each sample.

Sample A: CVA=CVA=

%

Sample B: CVB=CVB=

%

Round to two decimal places if necessary

c. Which sample is more variable?

Sample A

Sample B

Neither sample is more variable than the other