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# Solved: Estimating Standard Deviation with the Range Rule

## Problem 32BSC Chapter 3.3

Elementary Statistics | 12th Edition

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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:

 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

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Solved: Estimating Standard Deviation with the Range Rule

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