You want to purchase stock in a company and are deciding between two different stocks. Because a stock's risk can be associated with the standard deviation of its daily closing prices, you randomly select samples of the daily closing prices for each stock to obtain the results shown at the left. At \(\alpha=0.05\), can you conclude that one of the two stocks is a riskier investment? Assume the stock closing prices are normally distributed.

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Stock A Stock B n = 30 $2=3.5 n = 31 $ = 5.7