Find The Z Values Based On A Standard Normal Distribution For Each Of The Follow

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I need help with a  statistics problem.

Find the Z* values based on a standard normal distribution for each of the following.

A 78% confidence interval for a proportion_________

Round your answer to three decimal places.

An 84% confidence interval for a slope_______

Round your answer to three decimal places.

A 92% confidence interval for a standard deviation______

Round your answer to three decimal places.

Thank you,

Jessica

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