Answered: Let’s explore how changing the sample…

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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Let’s explore how changing the sample size while fixing all of the other parameters in the hypothesis test impacts the likelihood of rejecting the null hypothesis. Instead of a sample size of 100, let’s suppose we got the same sample proportion from a sample of 1000 local customers.

Conduct a hypothesis test at the .08 level of significance to test the claim that the population proportion of local customers who rate their service ABOVE AVERAGE is more than the national proportion (82%).

Check that we can use the normal distribution to approximate the distribution of the sample statistic (the sample proportion). Remember that the sample size has changed.

np = _______

nq = _______

State hypotheses.

H_O:

Ha:

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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