Find the critical value z_alpha/2 that corresponds to alpha = 0.03. z_alpha/2 = (Round to two decimal places as needed.) Use the given data to find the minimum sample size required to estimate a population proportion or percentage. Margin of error: 0.03; confidence level 90%; p^and q^unknown n = (Round up to the nearest integer.) Many states are carefully considering steps that would help them collect sales taxes on items purchased through the Internet. How many randomly selected sales transactions must be surveyed to determine the percentage that transpired over the Internet? Assume that we want to be 90% confident that the sample percentage is within seven percentage points of the true population percentage for all sales transactions. n = (Round up to the nearest integer.) Find the sample size, n, needed to estimate the percentage of adults who have consulted fortune tellers. Use a 0.08 margin of error, use a confidence level of 98%, and use results from a prior poll suggesting that 16% of adults have consulted fortune tellers. N = (Round up to the nearest integer.)