Earthquake Depths Data Set 16 in Appendix: Data Sets lists the depths (km) of a sample of 50 earthquakes. Those 50 depths have a mean of 9.808 km and a standard deviation of 5.013 km. Construct a 98% confidence interval estimate of the mean of all such depths. Is the confidence interval affected by the fact that the data appear to be from a population that is not normally distributed? (Hint: If using Table 3: t distribution in Appendix: Tables to find the critical value ta/2, that table does might not include 49 degrees of freedom, so use the closest value for 50 degrees of freedom.)