Answered: If a population has mean mu and unknown…

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

If a population has mean mu and unknown standard deviation sigma, then the right sampling distribution to use for the test statistic is ?

x bar- mu

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sqaure root of n

(heres the best i can show of the example)

A. A T distribution (n-1 df) but only if the population is reasonably assumed to be normally distributed

b. a z distribution, but only after properly standardizing

c. always a t distribution having n-1 degrees of freedom

d. a normal ditribution where we have approximated the mean ans std dev

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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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