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11 Dec 2021
Problem 99
Page 562
Section: HOMEWORK
Chapter 10: HYPOTHESIS TESTING WITH TWO SAMPLE
Textbook ExpertVerified Tutor
11 Dec 2021
Given information
A recent drug survey showed an increase in the use of drugs and alcohol among local high school seniors as compared to the national percent. Suppose that a survey of 
local seniors and national seniors is conducted to see if the proportion of drug and alcohol use is higher locally than nationally. Locally, 
seniors reported using drugs or alcohol within the past month, while 
national seniors reported using them.
Step-by-step explanation
Step 1.
The hypothesis testing in the required format as given in the problem is as follows:
Where, subscript 
stands for the local high school and 
for the national high school.
The null hypothesis can be stated as follows:
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Introductory Statistics
OER Edition, 2013
Openstax
ISBN: 9781938168208
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