Question

The amount of energy a single family home uses in a month is normally distributed with...

The amount of energy a single family home uses in a month is normally distributed with a mean of ?=945 kWh and a standard deviation of ?=236.3 kWh.

a. Find the probability that a randomly selected home uses between 543 kWh and 1122 kWh each month. Round your answer to 4 decimal places.

b. The utility company will send you an alert if you are in the top 10% of energy users. What amount of energy consumption would trigger an alert? Round your answer to the nearest whole number.

__________ kWh

Math   Statistics-And-Probability   
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