Use the following information to answer the next 2 questions. any studies have b

Question

Use the following information to answer the next 2 questions. any studies have been conducted to test the effects of mariiuana use on mental abilities. In one such study, groups of light and heavy users of marijuana in claim that population of heavy marijuana users has a different mean memory recall 24. What is the appropriate test? college were tested for memory recall. The researcher is interested in testing the than the light users. A. one-sample t test . matched-pairs t test two-sample t test D. simple linear regression 25. Power refers to: A. the ability to detect a difference in average memory recall when in fact there is no difference. B. the ability to not detect a difference in average memory recall when in fact there is no difference C. the ability to detect a difference in average memory recall when in fact there is a difference. D. the ability to not detect a difference in average memory recall when in fact there is a difference. E. the ability to make a correct decision regardless of the effect of marijuana.

Explanation / Answer

Answer 24 is already answered and option C is correct because we have two samples, so we need to use the two sample t test

one sample t test is incorrect because we have two samples, so we cant use one sample t test

matched pairs t test is incorrect because we have two different groups, so there is no matching between the groups

simple linear regression is incorrect because we are testing the difference between light and heavy users of marijuana, so there is no case of finding the linear regression or correlation.

Answer 25

Correct option is C

we know that the power is the probability of not committing type 2 error

In this case, type 2 error will be the ability to not detect the difference when in fact there is difference

so, the power means we have to make correct decision about null hypothesis which is incorrectly accepted in type 2 error

this means, the power will be the ability to detect the difference when in fact there is a difference

thats why, Option C is correct

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