6.29 According to the records of an electric company serving the Boston area, the mean electricity consumption for all households dur- ing winter is 1650 kilowatt-hours per month. Assume that the monthly electricity consumptions during winter by all households in this area have a normal distribution with a mean of 1650 kilowatt-hours and a standard deviation of 320 kilowatt-hours a. Find the probability that the monthly electricity consumption during winter by a randomly selected household from this area is less than 1950 kilowatt-hours. b. What percentage of the households in this area have a monthly electricity consumption of 900 to 1300 kilowatt-hours?
6.29 According to the records of an electric company serving the Boston area, the mean electricity consumption for all households dur- ing winter is 1650 kilowatt-hours per month. Assume that the monthly electricity consumptions during winter by all households in this area have a normal distribution with a mean of 1650 kilowatt-hours and a standard deviation of 320 kilowatt-hours a. Find the probability that the monthly electricity consumption during winter by a randomly selected household from this area is less than 1950 kilowatt-hours. b. What percentage of the households in this area have a monthly electricity consumption of 900 to 1300 kilowatt-hours?
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Transcribed Image Text:6.29 According to the records of an electric company serving the
Boston area, the mean electricity consumption for all households dur-
ing winter is 1650 kilowatt-hours per month. Assume that the monthly
Transcribed Image Text:electricity consumptions during winter by all households in this area
have a normal distribution with a mean of 1650 kilowatt-hours and a
standard deviation of 320 kilowatt-hours
a. Find the probability that the monthly electricity consumption
during winter by a randomly selected household from this
area is less than 1950 kilowatt-hours.
b. What percentage of the households in this area have a monthly
electricity consumption of 900 to 1300 kilowatt-hours?
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