Solved: Estimating Standard Deviation with the Range Rule

Elementary Statistics | 12th Edition | ISBN: 9780321836960 | Authors: Mario F. Triola

Problem 32BSC Chapter 3.3

Elementary Statistics | 12th Edition

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Elementary Statistics | 12th Edition | ISBN: 9780321836960 | Authors: Mario F. Triola

Elementary Statistics | 12th Edition

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Problem 32BSC

 

Estimating Standard Deviation with the Range Rule of Thumb. In Exercises,refer to the data in the indicated exercise. After finding the range of the data, use the range ruh of thumb to estimate the value of the standard deviation. Compare the result to the standard deviation computed with all of the data.

IQ Scores Data Set 6 and use the listed IQ scores.

Step-by-Step Solution:

Answer

IQ

(x-)

96

25

89

144

87

196

87

196

101

0

103

4

103

4

96

25

127

676

126

625

101

0

96

25

93

64

88

169

94

49

85

256

97

16

114

169

113

144

124

529

Total=2020

3316

Step 1 of 3</p>

Range=Largest value-Smallest value              

          =127-85

          =42

Standard deviation with range rule of thumb=Range/4

                                                                =42/4

                                                                =10.5

Step 2 of 3</p>

 = =

                =101

Variance==

                                 =165.8

Step 3 of 3

Chapter 3.3, Problem 32BSC is Solved
Textbook: Elementary Statistics
Edition: 12th
Author: Mario F. Triola
ISBN: 9780321836960

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Solved: Estimating Standard Deviation with the Range Rule

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