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

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