What proportion of homes heating with gas had a gas bill

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Reference no: EM131404344

During an annual heating season, the average gas bill for customers in a New England community heating their homes with gas was $457. Assuming a normal distribution and a standard deviation of $80:

a. What proportion of homes heating with gas had a gas bill over $382?

b. What proportion of homes heating with gas had a gas bill between $497 and $537?

c. What amount was exceeded by only 2.5% of the homes heating with gas?

d. What amount was exceeded by 95% of the homes heating with gas?

Reference no: EM131404344

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