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Chapter 7: Q .31 (page 429)

What is the z-score for 危x = 840?

Short Answer

Expert verified

The z-score for 危x = 840 is approximately 26

Step by step solution

01

Given Information

Given that details, the sample size of customers is 400 with a mean of 3 and the standard deviation is 0.7. The sum of values is 840, so theZ-score is given as:

02

Explanation

The sum of values is 840, so theZ-score is given as:

840=400脳3+(z)脳400脳0.7

-360=14.0(z)

z=25.714

z=26

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