# The average time for a mail carrier to cover a route is 380 minutes, and the standard deviation is 16 minutes.

The average time for a mail carrier to cover a route is 380 minutes, and the standard deviation is 16 minutes. If one of those trips is selected at random, find the probability that the carrier will have the following route time. Assume the variable is normally distributed. Find the following: At least 350 minutes, At most 395 minutes, How might a mail carrier estimate a range for the time he or she will spend en route?A marine sales dealer finds that the average price of a previously owned boat is \$6492. He decides to sell boats that will appeal to the middle 66% of the market in terms of price. Find the maximum and minimum prices of the boats the dealer will sell. The standard deviation is \$1025, and the variable is normally distributed.A contractor decides to build homes that will include the middle 80% of the market. If the average size of homes built is 1810 square feet, find the maximum and minimum sizes of the homes the contractor should build. Assume the standard deviation is 92 square feet and the variable is normally distributed.

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