Sentences were chosen at random from 14th Dalai Lama's book An Open Heart. The number of words in the sentences were counted. This is the result.

6

19

10

15

11

14

9

16

9

6

21

16

4

18

23

22

10

3

13

22

11

23

19

21

Problem:

Use the data above to: a) determine the mean and sample standard deviation, b) calculate a 95% margin of error, c) determine the respective confidence interval.