# Question

The following table gives information on the amounts (in dollars) of electric bills for August 2012 for a sample of 50 families.

Amount of Electric Bill

(dollars) Number of Families

0 to less than 60............. 5

60 to less than 120........... 16

120 to less than 180........... 11

180 to less than 240.......... 10

240 to less than 300.......... 8

Find the mean, variance, and standard deviation. Give a brief interpretation of the values in the column labeled mf in your table of calculations. What does represent?

Amount of Electric Bill

(dollars) Number of Families

0 to less than 60............. 5

60 to less than 120........... 16

120 to less than 180........... 11

180 to less than 240.......... 10

240 to less than 300.......... 8

Find the mean, variance, and standard deviation. Give a brief interpretation of the values in the column labeled mf in your table of calculations. What does represent?

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