# Question

A recent report indicated a typical family of four spends $490 per month on food. Assume the distribution of food expenditures for a family of four follows the normal distribution, with a standard deviation of $90 per month.

a. What percent of the families spend more than $30 but less than $490 per month on food?

b. What percent of the families spend less than $430 per month on food?

c. What percent spend between $430 and $600 per month on food?

d. What percent spend between $500 and $600 per month on food?

a. What percent of the families spend more than $30 but less than $490 per month on food?

b. What percent of the families spend less than $430 per month on food?

c. What percent spend between $430 and $600 per month on food?

d. What percent spend between $500 and $600 per month on food?

## Answer to relevant Questions

A study of long-distance phone calls made from General Electric Corporate Headquarters in Fairfield, Connecticut, revealed the length of the calls, in minutes, follows the normal probability distribution. The mean length of ...Fast Service Truck Lines uses the Ford Super Duty F-750 exclusively. Management made a study of the maintenance costs and determined the number of miles traveled during the year followed the normal distribution. The mean of ...The goal at U.S. airports handling international flights is to clear these flights within 45 minutes. Let’s interpret this to mean that 95% of the flights are cleared in 45 minutes, so 5% of the flights take longer to ...A carbon monoxide detector in the Wheelock household activates once every 200 days on average. Assume this activation follows the exponential distribution. What is the probability that:a. There will be an alarm within the ...Customers at the Bank of Commerce of Idaho Falls, Idaho, default at a rate of .005 on small home-improvement loans. The bank has approved 400 small home-improvement loans. Assuming the Poisson probability distribution ...Post your question

0