A sample of the monthly amounts spent for food by families

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Reference no: EM13640440

A sample of the monthly amounts spent for food by families of four receiving food stamps approximates a symmetrical, bell-shaped frequnecy distribution. The sample mean is $150; the standard deviation is $20.

a) About 68 percent of the monthly food expenditures are between what two amounts?

b) About 95 percent of the monthly food expenditures are between what two amounts?

Reference no: EM13640440

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