Telles, Singh, and Balkrishna (2012) reported that yoga training improves finger dexterity. Suppose that a researche an experiment evaluating the effect of yoga on standardized O'Conner finger dexterity test scores. A sample of n= participants is selected, and each person receives yoga training before being tested on a standardized dexterity tas that for the regular population, scores on the dexterity task form a normal distribution with µ = 50 and o = 8. The tre expected to increase scores on the test by an average of 3 points. If the ro searchor uses a two toiled tost with 05 what is the power of the bynothesis tost?

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Please draw out the graph as well. I am also confused on how I know which column to refer to in the unit normal table. For example, if I am looking in column B (body) how do I know that I need to do that? If there something in the graph that tells me? Thank you.

22. Telles, Singh, and Balkrishna (2012) reported that yoga training improves finger dexterity. Suppose that a researcher conducts
an experiment evaluating the effect of yoga on standardized O'Conner finger dexterity test scores. A sample of n = 4
participants is selected, and each person receives yoga training before being tested on a standardized dexterity task. Suppose
that for the regular population, scores on the dexterity task form a normal distribution with u
50 and o
8. The treatment is
expected to increase scores on the test by an average of 3 points.
a. If the researcher uses a two-tailed test with a = .05, what is the power of the hypothesis test?
b. Again, assuming a two-tailed test with a = .05, what is the power of the hypothesis test if the sample size were increased to
n = 64?
Transcribed Image Text:22. Telles, Singh, and Balkrishna (2012) reported that yoga training improves finger dexterity. Suppose that a researcher conducts an experiment evaluating the effect of yoga on standardized O'Conner finger dexterity test scores. A sample of n = 4 participants is selected, and each person receives yoga training before being tested on a standardized dexterity task. Suppose that for the regular population, scores on the dexterity task form a normal distribution with u 50 and o 8. The treatment is expected to increase scores on the test by an average of 3 points. a. If the researcher uses a two-tailed test with a = .05, what is the power of the hypothesis test? b. Again, assuming a two-tailed test with a = .05, what is the power of the hypothesis test if the sample size were increased to n = 64?
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