Question
Asked Nov 5, 2019
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a sample size n=99 is drawn from a population whose standard deaviation is 11

(a) find the margin of error for a confidence interval for u (population mean). round the answer to at least three decimal places 

the margin of error for a 90% confidence for u (population mean) is 

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Expert Answer

Step 1

Given information:

Sample size (n)=99

Standard deviation=11

Confidence level=90%

=0.90

Step 2

So,

Significance level=1- Confidence level

=1-0.90

=0.10

Step 3

Now, the value of Z-score in the normal distribution in two t...

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