Complete: Chapter 8 Problem Set The alpha level that a researcher sets at the be

Question

Complete: Chapter 8 Problem Set The alpha level that a researcher sets at the beginning of the experiment is the level to which she wishes to limit the probability of making the error of 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 nondirectiona, meaning that the critical region is split across both tails of the distribution The z-score boundaries at an alpha level a05 are O z-2.58 and z-2.58 O z 3.29 and z--3.29 O z-1.96 and z1.96 To use the tool to identify the 2-score boundaries, click an the lcon with two orange lines, and slide the orange lines until the area in the critical region equals the alpha level, Remember that the probability will need to be split between the two tails. To use the tool to help you evaluate the hypothesis, click on the icon with the purple line, place the two orange lines on the critical values, and then place the purple line on the z stati Standard Normal Distribution Mean- 0.0 Standard Deviation-1.0 The critical region is MacBook Pro G Search or type URL 2 3 4 5 6

Explanation / Answer

The z scores boundaries at alpha level =0.05

C) z=1.96 and z=-1.96

The z scores boundaries at alpha level =0.001

c)z=3.29 and z=-3.29

The z static is in critical region.therefore, researchers should reject null hypothesis and she is true that conclude the alternative hypothesis is probably correct

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