Question

Find Zc when c=0.75. In other words, find Z0.75 Draw a visual display Not confidence interval...

Find Zc when c=0.75. In other words, find Z0.75

Draw a visual display

Not confidence interval question. I need help finding a specific area & Z-scores.

Thank you

Math   Statistics-And-Probability   
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Homework Answers

Answer #1

When you consider any Normal distribution Z scores associated with the percentage of area under the curve follows the following table

Confidence % (Area under curve) Standard Deviations (Z -Value)
50 % 0.67449
75 % 1.15035
90 % 1.95996
97 % 2.17009
99 % 2.57583
99.9 % 3.29053

I have also drawn the curve using the example of 1 Standard deveiation from mean on both the side account for 68% of the area under the curve.

I hope the table and the image is able to help you get your answer.

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