Answered: Suppose we are interested investigating…

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

Suppose we are interested investigating the mean \muμ for some population. We want to test the hypotheses

H0:μ=5.5

Ha:μ=5.5

a)What type of test would be appropriate here and why?

b)We take a sample of size n = 25, and find a sample mean of 6.3, with an sd of 1.8.Which of the following choices do we still need to know in order to apply the test from the previous part?

Choice 1:We have a random sample.

Choice 2:The distribution of the quantitative variable is approximately normal in the population.

Choice 3:The distribution of the quantitative variable is approximately normal in our sample.

Choice 4:Our sample size is at least 30.

c)Find the test statistic for our hypothesis test.

d)The P-value is______

e)At the α=0.05 significance level, what conclusions can we make and why?

Choice 1:Reject the null hypothesis.

Choice 2:Fail to reject the null hypothesis.

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for d how can you calculate the p value without excel? need to be able to do on a test without excel or statkey. It is also saying the answer is incorrect. P does not equal 0.036

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