Lillianna Holland

Mathematics

25 March, 14:49

A scientist calculated the mean and standard deviation of a data set to be mean = 120 and standard deviation = 9. She then found that she was missing one data value from the set. She knows that the missing data value was exactly 3 standard deviations away from the mean. What was the missing data value?

A. 129

B. 147

C. 360

D. 369

+2

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