Answered: An elevator has a placard stating that…

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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Question

An elevator has a placard stating that the maximum capacity is

2016

lb—12

passengers. So,

adult male passengers can have a mean weight of up to

2016/12=168 pounds.

If the elevator is loaded with

adult male passengers, find the probability that it is overloaded because they have a mean weight greater than

168

lb. (Assume that weights of males are normally distributed with a mean of

174 lb

and a standard deviation of

25 lb.)

Does this elevator appear to be safe?

The probability the elevator is overloaded is

nothing.

(Round to four decimal places as needed.)

Does this elevator appear to be safe?

A. YES, THERE IS A GOOD CHANCE THAT 12 RANDOMLY SELETECTED PEOPLE WILL NOT EXCEED THE ELEVATOR CAPACITY.

B. NO, 12 RANDOMLY SELECTED PEOPLE WILL NEVER BE UNDER THE WEIGHT LIMIT

C. NO, THERE IS A GOOD CHANCE THAT 12 RANDOMLY SELECTED ADULT MALE PASSENGERS WILL EXCEED THE ELEVATOR CAPACITY

D. YES, 12 RANDOMLY SELECTED ADULT MALE PASSENGERS WILL ALWAYD BE UNDER THE WEIGHT LIMIT

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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