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You are considering testing a new drug that is supposed to facilitate learning in mentally retarded...

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Basic Math

You are considering testing a new drug that is supposed tofacilitate learning in mentally retarded children. Based onpreliminary research, you have some idea about the size of thedrug's effect. Because of your work schedule you can either do thetest with 15 subjects or with 20. You would like to only run 15subjects, but if running 20 will make power at least 20% higher,you will run 20 subjects. Calculate power for the followingconditions: a. N = 15, a = .051 tail, Preal = 0.70. b. N = 20, a =.051 tail, Preal = 0.70. c. Based on your calculations, how manysubjects will you test?

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A new drug that is supposed to facilitate learning in mentallyretarded children Based on preliminary research you have someidea about the size of the drugs effect Because of your workschedule you can either do the test with 15 subjects or with 20You would like to only run 15 subjects but if running 20 will makepower at least 20 higher you will    See Answer
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