Based on the following daily percent changes of the S&P 500 stock market index for June 2010 (accessed at http:// finance.Yahoo.com on July 13, 2010), find the 95% confidence interval for the population mean daily change. (This is not, strictly speaking, a random sample from a population. However, the random walk theory of the stock market suggests that the changes of the market do actually behave like a random sample. The population would represent all daily market changes that might happen under conditions that prevailed during that time.) 

1:01%, 3:10%, 0:20%,0:29%, 1:68%, 0:30%, 1:61%, 0:39%,0:13%,0:13%, 0:06%,2:35%, 0:18%,0:44%,2:95%, 0:59%,1:10%, 1:35%, 3:44%,0:41%,2:58%, 1:72%