Answered: ctrical customers are often told what…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Electrical customers are often told what the average amount of electricity is used for similar homes in their region. During the winter, the mean electrical consumption for similar homes in a region is 1650 kilowatt hours per month. Assume this electrical consumption has a normal distribution. The standard deviation is 320 kilowatt hours. The company has sent a notice to customer John Williamson informing him that about 86% of households use less electricity per month than he does. What is John Williamson's monthly electric consumption?

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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