In testing the hypothesis about the mean,which of the following will merit using the t-testover the z-test?When sample size is at least 30When the population standard deviation is givenO When the population variance is not givenO All of the above

For testing the mean, If the value of the population standard deviation is known, then the one…

Answered: In testing the hypothesis about 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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One-Way Airfares The average one-way airfare from Pittsburgh to Washington D.C. is $236. A random sample of 19 one-way fares during a particular month had a mean of $208 with a standard deviation of $43. At α=0.05, is there sufficient evidence to conclude a difference from the stated mean?
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When using an Analysis of Variance test, in order to find out which specific means are different from one another which test is used? a. t-test b. post hoc test c. Cohen’s D test d. Chi-square test
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In testing the hypothesis about the mean, which of the following will merit using the t-test over the z-test? When sample size is at least 30 O When the population standard deviation is given When the population variance is not given All of the above