Answered: If two independent sufficiently large…

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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If two independent sufficiently large samples are taken from two populations with known population standard deviations, the sampling distribution of the difference, sample mean (/x)1 - sample mean (/x)2 , between the two sample means /x1 and /x2

a. can be approximated by poisson distribution

b. will have a variance of one.

c. can be approximated by a normal distribution

d. will have a mean of one.

I would like to know why the answer is the answer and thank you.

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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