What is the median value of the following data set?

8 16 14 12 22 7 2 31

13

None of the above

12

17

14

Is a data set has 10 values, with a mean of 75, and a variance of 11, what is the standard deviation?

None of the above

7.5

3.31

121

1.1

Students' grades on the statistic quiz are given in the table below:

75 87 95 86 64 71 60 97 97 85

What is the inner quartile range for this table?

93

21

None of the above

72

14