Question

In 2015, the United States Department of Agriculture issued a report indicating that a family of four spent an average of about $890 per month on food (http://www.cnpp.usda.gov/sites/default/files/CostofFoodMar2015.pdf). Assume the distribution of food expenditures for a family of four follows the normal distribution, with a standard deviation of $90 per month. (Round intermediate calculations and final answers to 2 decimal places.) What percent of the families spend more than $430 but less than $890 per month on food? What percent of the families spend less than $830 per month on food? What percent spend between $830 and $1,000 per month on food? What percent spend between $900 and $1,000 per month on food?

          In 2015, the United States Department of Agriculture issued a report indicating that a family of four spent an average of about $890 per month on food (http://www.cnpp.usda.gov/sites/default/files/CostofFoodMar2015.pdf). Assume the distribution of food expenditures for a family of four follows the normal distribution, with a standard deviation of $90 per month. (Round intermediate calculations and final answers to 2 decimal places.)

What percent of the families spend more than $430 but less than $890 per month on food?
What percent of the families spend less than $830 per month on food?
What percent spend between $830 and $1,000 per month on food?
What percent spend between $900 and $1,000 per month on food?

Added by Brian B.

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