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(For problems 9-10) The numbers of named storms in the Atlantic Basin from 2000-2009 were entered into Excel and the mean and
The least number of named storms was 9 in this period which occurred in 2009. What is the z-score for this value? (Choose the
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Answer #1

Excel function for mean = AVERAGE(B2:B11)

z score for 9:

z = (9-15)/4.7 = -1.277 = -1.3

Answer b. -1.3

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