2.4.25 The lengths of the Brst 10 words of 2 books are Isted below. Find the ran

Question

2.4.25 The lengths of the Brst 10 words of 2 books are Isted below. Find the range, variance, and standard deviation for each of the two samples, then compare the two sets of Questor, Help * Book 2 12 12 6 12 12 8 1245 results Does there appear to be a difference in varlation? Book 2: 3 5 2366656 4 Find the range for book 1 Range 10 letters Find the range for book 2 Range - 4 lothesrs Find the sample variance and sample standard deviation for book 1 Sample varianceletters (Round to one decimal place as needed) Enter your answer in the answer box and then click Check Answer Cler A 2/9/2017 debit usbank

Explanation / Answer

A) For book 1

Range = 12 - 2 = 10

Sample mean = (2 + 12 + 12 + 6 + 12 + 12 + 8 + 12 + 4 +5)/10 = 8.5

Sample variance = ((2 - 8.5)^2 + (12 - 8.5)^2 + (12 - 8.5)^2 + (6 - 8.5)^2 + (12 - 8.5)^2 + (12 - 8.5)^2 + (8 - 8.5)^2 + (12 - 8.5)^2 + (4 - 8.5)^2 + (5 - 8.5)^2)/9 = 15.8

Sample standard deviation = sqrt (15.8) = 3.97

B) For book 2

Sample mean = (3 + 5 + 2 + 3 + 6 + 6 + 6 + 5 + 6 + 4)/10 = 4.6

Sample Variance = ((3 - 4.6)^2 + (5 - 4.6)^2 + (2 - 4.6)^2 + (3 - 4.6)^2 + (6 - 4.6)^2 + (6 - 4.6)^2 + (6 - 4.6)^2 + (5 - 4.6)^2 + (6 - 4.6)^2 + (4 - 4.6)^2)/9 = 2.3

Sample standard deviation = sqrt (2.3) = 1.5

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