Answered: Suppose that a brand of lightbulb lasts…

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

Suppose that a brand of lightbulb lasts on average 2634 hours with a standard deviation of 175 hours. Assume the life of the lightbulb is normally distributed. Calculate the probability that a particular bulb will last from 2190 to 2736 hours?

P(2190 < X < 2736) =

ps. i got 0.7133 but its not correct

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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