### 36. Electric BillsAccording to the U.S. Energy Information Administration, the mean monthly household electric bill in the United States in a recent year was $110.14. Assume the amounts are normally distributed with a standard deviation of $20.00.#### Questions:a. **What proportion of bills are greater than $130?**b. **What proportion of bills are between $85 and $140?**c. **What is the probability that a randomly selected household had a monthly bill less than $120?**To answer these questions, students should apply concepts from statistics related to the normal distribution, z-scores, and probability. They may need to use a standard normal distribution table or a calculator capable of statistical functions.

Mean()=110.14standard deviation()=20.00

Answered: Electric bills: According to the U.S.…

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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