Use the appropriate grouping method to : a. determine a frequency distribution. b. obtain a relative-frequency distribution. c. construct a frequency histogram based on your result from part (a). d. construct a relative-frequency histogram based on your result from part (b). Residential Energy Consumption Survey: Consumption and Expenditures. The following table gives one year’s energy consumption for a sample of 50 households in the South. Data are in millions of BTUs.

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