Question: The U.S. Energy Information Administration collects data on residential energy consumption and expenditures. The following data gives one year's energy consumptions for a sample of 50 households in the south. (Data in millions BTUs.)

130, 55, 45, 64, 155, 66, 60, 80, 102, 62, 58, 101, 75, 111, 151, 139, 81, 55, 66, 90, 97, 77, 51, 67, 125, 50, 136, 55, 83, 91, 54, 86, 100, 78, 93, 113, 111, 104, 96, 113, 96, 87, 129, 109, 69, 94, 99, 97, 83, 97

Use classes of equal widths beginning with 41 to 50, construct a grouped-data table, find the frequency, relative frequency, draw the histogram, and the frequency polygon.