Question: Consider Exercise 1.6 from your textbook featuring Method Three ( between ) for estimating SD(X) based on range for three sub-groups of data. Calculate a

Consider Exercise 1.6 from your textbook featuring Method Three (between) for estimating SD(X) based on range for three sub-groups of data. Calculate a 'between' unbiased estimate of SD(X) based on range for the following data set:

Sample 1 Sample 2 Sample 3
9 4 16
9 5 11
15 13 4
1 7 8
12 10 14
1 8 8
15 16 20
8 20 15

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