This Question: 1 pt 4° of 6002 complete) This Test: 60 pts possible Statistics a

Question

This Question: 1 pt 4° of 6002 complete) This Test: 60 pts possible Statistics are sometimes used to compare or identify authors of different works. The lengths of the first 10 words in a book by Terry are listed with the first 10 words in a book by David. Find the mean and median for each of the two samples, then compare the two sets of results Terry 7 3 10 David The mean number of letters per word in Terry's book is The median number of letters per word in Terry's book is The mean number of letters per word in Davids book is The median number of letters per word in David's book its Compare the two sets of results. Does there appear to be a difference? OA· Yes. Based on the results, words in Terry's book are shorter than the words in Davids book. O B. Yes. Based on the results, words in Terry's book are longer than the words in David's book. O C. No. Based on the results, words in Terys book are the same length as the words in David's book 15

Explanation / Answer

Result:

Q40).

Terry mean : 4.0

Terry median: 3.0

David mean: 2.90

David median: 3.0

B. Yes, Based on the results, words in Terrys book are longer than the words in the David book.

Q41).

mid x

f

x*f

42

3

126

47

6

282

52

11

572

57

6

342

62

2

124

Total

28

1446

Mean =1446/28=51.6428

=51.6 ( one decimal).

A). the computed mean is not close to the actual mean because the difference between the means is more than 5%.

Q42).

range: 126

Variance = 114.8

Standard deviation: 10.7

A). Ideally the standard deviation would be 0 because the measurements should be same.

mid x

f

x*f

42

3

126

47

6

282

52

11

572

57

6

342

62

2

124

Total

28

1446

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