At the end of 2015, 2016, and 2017, the average prices of a share of stock in a portfolio were $34.83, $34.65, and $31.26 respectively. To investigate the average share price at the end of 2018, a random sample of 30 stocks was drawn and their closing prices on the last trading day of 2018 were observed with a mean of 33.583 and a standard deviation of 19.149. Estimate the average price of a share of stock in the portfolio at the end of 2018 with a 95% confidence interval. Compare and Briefly discuss

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