8 help the 1st drop down choices are yes or no the 2nd drop

#8 help

the 1st drop down choices are; yes or no
the 2nd drop down choices are; A B C
The 3rd drop down choices are; A B C

Solution

calculated the standar variation we have the following

a. 12,53

b. 10,53

c. 13, 10

so C have the highest and B the lowest