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A researcher would like to study BMI levels in adults 20-40 years of age. She selected 9 patients and found their BMI values to be:

A researcher would like to study BMI levels in adults 20-40 years of age. She selected 9 patients and found their BMI values to be: 38, 19, 25, 26, 29, 18, 34, 32, 30

The standard deviation of BMI levels of this group of patients is

5.7

5.9

6.4

6.6

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