Answered: If you are asked to conduct a test, you…

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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If you are asked to conduct a test, you need to write all the 5 steps.
Step I. write correct hypothesis
Step II. Calculate the value of test statistic
Step III. Find out the rejection region or calculate the p-value
Step IV. Write the decision
Step V. Write a conclusion in the context of the problem

A special interest group asserts that 90% of all smokers began smoking before age 18. In a sample of 850 smokers, 687 began smoking before age 18. Test whether the true proportion of all smokers who began smoking before age 18 is less than 90%, at the 1% level of significance.
a. using the critical value approach
b. using the p- value approach

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