From the New York Stock Exchange website, take a random sample of 25 companies from the S&P 500 index. List the companies that you selected. Calculate a 90 percent confidence interval for the average closing stock price on a specific day (list the day). Explain your results.(Statistic)

From the New York Stock Exchange website, take a random sample of 25 companies from the S&P 500 index. List the companies that you selected. Calculate a 90 percent confidence interval for the average closing stock price on a specific day (list the day). Explain your results.(Statistic)