Answered: Data for a large company shows the…

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

Data for a large company shows the average length of time an employee
stays with the company is 8.5 years with a standard deviation of 2.9 years. If the
data is normally distributed, find the probability a randomly selected worker has
worked for the company more than 13 years.

a. 0.0606
b. 0.0985
c. 0.9015
d. 0.9394

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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