Answered: 21 - You want to give an estimate of…

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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21 -

You want to give an estimate of the 95% confidence interval for the population mean. If the sample mean is 1000 and the sample standard error is 50, assuming that the population from which the sample is drawn is normally distributed and the sample size is large enough, which of the following is the length of the confidence interval?

252

392

NS)

196

D)	one hundred

TO)

378

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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