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If a set of data has a mean of 50 and a standard deviation of 4.5, what is the z-score for a value of 40? a) 2.22 b) -0.71 c) 0.71 d) -2.22

If a set of data has a mean of 50 and a standard deviation of 4.5, what is the z-score for a value of 40? a) 2.22 b) -0.71 c) 0.71 d) -2.22

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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If a set of data has a mean of 50 and a standard deviation of 4.5, what is the z-score for a value of 40? a) 2.22 b) -0.71 c) 0.71 d) -2.22
Transcribed Image Text:If a set of data has a mean of 50 and a standard deviation of 4.5, what is the z-score for a value of 40? a) 2.22 b) -0.71 c) 0.71 d) -2.22
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