Attempts: 3. Alpha level and the critical region The alpha level is set[ before
ID: 3059406 • Letter: A
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Attempts: 3. Alpha level and the critical region The alpha level is set[ before atthe beginning of an experiment Average: 17 Aa Aa the analysis of the data. after (at the end of an experiment) before (at the beginning of an experiment) Use the following Distributions tool to identify the boundaries that separate the extreme samples from the samples that are more obviously consistent with the null hypothesis. Assume the null hypothesis is nondi that the critical region is split across both tails of the distribution rectional, meaning The z-score boundaries at an alpha level = .05 are: O z 2.58 and z--2.58 O z 3.29 and z _-3.29 z-1.96 and z "-1.96 To use the tool to identify the z-score boundaries, click on the icon with two orange lines, and slide the orange lines until the area in the critical region equals the alpha level. Remember that the the two tails. probability will need to be split between To use the tool to help you evaluate the hypothesis, click on on the critical values, and then place the purple line on the z statistic. the icon with the purple line, place the two orange lines Standard Normal Distribution Mean - 0.0 Standard Deviation 1.0 8 8Explanation / Answer
Attempts: 3. Alpha level and the critical region The alpha level is set[ before atthe beginning of an experiment Average: 17 Aa Aa the analysis of the data. after (at the end of an experiment) before (at the beginning of an experiment) Use the following Distributions tool to identify the boundaries that separate the extreme samples from the samples that are more obviously consistent with the null hypothesis. Assume the null hypothesis is nondi that the critical region is split across both tails of the distribution rectional, meaning The z-score boundaries at an alpha level = .05 are: O z 2.58 and z--2.58 O z 3.29 and z _-3.29 z-1.96 and z "-1.96 To use the tool to identify the z-score boundaries, click on the icon with two orange lines, and slide the orange lines until the area in the critical region equals the alpha level. Remember that the the two tails. probability will need to be split between To use the tool to help you evaluate the hypothesis, click on on the critical values, and then place the purple line on the z statistic. the icon with the purple line, place the two orange lines Standard Normal Distribution Mean - 0.0 Standard Deviation 1.0 8 8
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