The distribution of the tuitions, fees, and room and board charges of a random sample of public 4-year degree-granting postsecondary institutions is shown in the pie chart. Make a frequency distribution for the data. Then use the table to estimate the sample mean and the sample standard deviation of the data set. Use $26249.50 as the midpoint for "$25,000 or more." Complete the frequency distribution for the data. (Type integers or decimals. Do not round.) Class X $15,000 $17,499 $17,500 $19,999 $20,000 $22,499 $22,500 $24,999 $25,000 or more f 16,249.50 9 18,749.50 12 21,249.50 13 23,749.50 11 26,249.50 6 The sample mean is x = $ (Round to the nearest cent.) $15,000-$17,499: 9 $17,500-$19,999: 12 $20,000-$22,499: 13 $22,500-$24,999: 11 $25,000 or more: 6