Given Samples A and B below,

Sample A:	4.3	3.7	3.2	2.5	4.6	3.0	3.0	4.3	2.3
Sample B:	4.9	4.1	3.4	2.3	2.6	3.0	2.3	2.6	2.1

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