What are the null and alternative hypotheses? b. Using an alpha level of .05 (2-tailed), determine whether his sample was significantly different from population. c. Given your conclusion in part b, what type of error might you be making

What are the null and alternative hypotheses? b. Using an alpha level of .05 (2-tailed), determine whether his sample was significantly different from population. c. Given your conclusion in part b, what type of error might you be making

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.4: Distributions Of Data

Problem 19PFA

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Question

A clinical psychologist posits that drug use leads to conduct problems. To test this, he examines whether his adolescent inpatient drug users were elevated in terms of conduct disorder (CD). A sample of 100 was evaluated using a standard measure of CD; they had a mean score of 53. The population mean (µ) for the CD scale is 50 with a standard deviation (σ) of 10. (Show all work.)

a. What are the null and alternative hypotheses?

b. Using an alpha level of .05 (2-tailed), determine whether his sample was significantly different from population.

c. Given your conclusion in part b, what type of error might you be making?

d. Report and interpret an effect size.

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