SOLUTION: Researchers were examining whether or not the average monthly use of marijuana had changed for high school students in California. Population data from 2005 showed that high schoo

Question 1168602: Researchers were examining whether or not the average monthly use of marijuana
had changed for high school students in California. Population data from 2005 showed that high school students smoked marijuana an average of 5 times per month. Sample data from 2017 produced a 95% confidence interval that
suggested high school students smoke marijuana between 2.38 and 6.24 times per
month. Using this information, we can conclude that the researchers who
collected the 2017 data would…
a. …reject the null hypothesis (assuming α = .05).
b. …fail to reject the null hypothesis (assuming α = .05).
c. There is not enough information to draw a conclusion
I got A am I correct?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
fail to reject (B)
4 is within the CI, so it is a plausible value in the context of this question, which I believe was that Cal arrests were the same as Nevada's (which I think was 4).
The point is that if the CI contains the parameter one is testing, then there is no difference. If the CI doesn't contain the parameter of interest, there is a difference. Any value within the CI may be considered a plausible value for the parameter of interest.
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