Wednesday

August 20, 2014

August 20, 2014

Posted by **Melissa Williams** on Friday, March 18, 2011 at 11:30pm.

a. Can the researcher conclude that endurance scores with the sports drink are significantly higher than scores without the drink? Use a one- tailed test with α=.05.

b. Can the researcher conclude that endurance scores with the sports drink are significantly different than scores without the drink? Use a two- tailed test with α=.05.

c. You should find that the two tests lead to different conclusions. Explain why.

- statistics -
**Melissa Williams**, Friday, March 18, 2011 at 11:45pmBriefly explain how increasing sample size influences each of the following. Assume that all other factors are held constant.

a. The size of the z- score in a hypothesis test.

b. The size of Cohen’s d.

c. The power of a hypothesis test.

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