Assume that the mean IQ for all 10th graders at a large high school (i.e., population) is

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Assume that the mean IQ for all 10th graders at a large high school (i.e., population) is 100 with σ = 15 and that the students are assigned at random to classes with an N of 25.

a. What is the z score for a class whose IQ averages 104? What is the one-tailed p value for this z score? What is the two-tailed p?

b. Repeat part (a) for a class whose mean IQ is 92.

c. Perform two-tailed null hypothesis tests for the classes in part (a) and part (b) at both the .05 and .01 levels.

In each case explain whether you could be making a Type I or Type II error.

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Introductory Statistics For The Behavioral Sciences

ISBN: 9780470907764

7th Edition

Authors: Joan Welkowitz, Barry H. Cohen, R. Brooke Lea

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Question Posted: Dec 08, 2018 07:48 AM

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Assume that the mean IQ for all 10th graders at a large high school (i.e., population) is

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a onetailed p 0918 twotailed p 1836 b onetailed p 0038 twotailed p 0076 c 133 196 twotailed z ...View the full answer

Introductory Statistics For The Behavioral Sciences

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