Sentences were chosen at random from George Orwell's book Nineteen Eighty Four. The number of words in the sentences were counted. This is the result.

16

5

5

14

3

16

18

3

10

20

7

16

11

11

14

9

19

13

11

5

5

21

17

16

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.