Comparing Two Independent Population Proportions · Exercise 15
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 100 local seniors and 100 national seniors is conducted to see if the proportion of drug and alcohol use is higher locally than nationally. Locally, 65 seniors reported using drugs or alcohol within the past month, while 60 national seniors reported using them.
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OpenStax, Introductory Business Statistics 2e · §10.4 Comparing Two Independent Population Proportions · Exercise 15
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