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9 Nov 2021

Given information

Here, the mean for the given distribution(μx)=$44,000; the standard deviation (σx)=$6,500;

Sample size(n)=10;

Step-by-step explanation

Step 1.

For, the 90th percentile for an individual teacher's salary;

NORM.S.INV(0.9)=1.281552;

So, P(Z<1.28)=0.90;

 

 

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Introductory Statistics
OER Edition, 2013
Openstax
ISBN: 9781938168208

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