Find the z* values based on a standard normal distribution for each of the following. (a) An 86% confidence interval for a correlation. Round your answer to three decimal places. +2* = i eTextbook and Media Hint (b) A 94% confidence interval for a difference in proportions. Round your answer to three decimal places. +2* = + i eTextbook and Media Hint (c) A 96% confidence interval for a proportion. Round your answer to three decimal places. +2 = i e Textbook and Media Hint