The closing prices of two common stocks were recorded for a period of 16 days. The means and variances were xbar1=40.33, xbar2=42.54, ssquared1=1.54, ssquared2=2.96. Do these data present sufficient evidence to indicate the difference in means of closing prices of the two stocks. Perform the hypothesis testing with alpha=0.05. Assume that population variances are not the same.