Answered: random sample of 54 students from…

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

A random sample of 54 students from Cabrillo College are selected from a normal population with mu equal to 20 and sigma equal to 5. After a treatment is administered to the students, the researcher calculated the sample mean to be 21. Is there enough evidence to conclude that the treatment had an effect at the 5% significance level?

If the 95% Confidence Interval is (19.67, 22.33) and the value stated in the null hypothesis is 20, what conclusion can we make?

(a)fail to reject the null hypothesis

(b)cannot determine

(c)reject the null hypothesis and accept the alternative hypothesis

(d)fail to reject the alternative hypothesis

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