5. A researcher plans to conduct an e ating the effect of a treatment. A sa participants is selected and each pe treatment before being tested on a terity task. The treatment is expect: on the test by an average of 30 poi population, scores on the dexterity mal distribution with pu = 240 and a. If the researcher uses a two-taile a = .05, what is the power of th b. Again assuming a two-tailed tes what is the power of the hypoth %3D %3D
5. A researcher plans to conduct an e ating the effect of a treatment. A sa participants is selected and each pe treatment before being tested on a terity task. The treatment is expect: on the test by an average of 30 poi population, scores on the dexterity mal distribution with pu = 240 and a. If the researcher uses a two-taile a = .05, what is the power of th b. Again assuming a two-tailed tes what is the power of the hypoth %3D %3D
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section: Chapter Questions
Problem 11MCQ
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Transcribed Image Text:A researcher plans to conduct an experiment evaluating the effect of a treatment. A sample of \( n = 9 \) participants is selected and each person receives the treatment before being tested on a standardized dexterity task. The treatment is expected to lower scores on the test by an average of 30 points. For the regular population, scores on the dexterity task form a normal distribution with \( \mu = 240 \) and \( \sigma = 30 \).
a. If the researcher uses a two-tailed test with \( \alpha = .05 \), what is the power of the hypothesis test?
b. Again assuming a two-tailed test with \( \alpha = .05 \), what is the power of the hypothesis test if the sample size is increased to \( n = 25 \)?
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