Statistics For Business And Economics, University Of Connecticut
18th Edition
ISBN: 9781323751497
Author: Mcclave/benson/sincich
Publisher: Pearson Education
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Chapter 15.6, Problem 15.61ACI
To determine
Whether the probability distributions of the at least two of the 11 item scores are differ in location or not.
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Does It Pay to Plead Guilty? The accompanying table summarizes randomly selected sample data for San Francisco defendants in burglary cases (based on data from “Does It Pay to Plead Guilty? Differential Sentencing and the Functioning of the Criminal Courts,” by Brereton and Casper, Law and Society Review, Vol. 16, No. 1). All of the subjects had prior prison sentences. Use a 0.05 significance level to test the claim that the sentence (sent to prison or not sent to prison) is independent of the plea. If you were an attorney defending a guilty defendant, would these results suggest that you should encourage a guilty plea?
A Canadian study measuring depression level in teens (as reported in the Journal of Adolescence, vol. 25, 2002) randomly sampled 112 male teens and 101 female teens, and scored them on a common depression scale (higher score representing more depression). The researchers suspected that the mean depression score for male teens is higher than for female teens, and wanted to check whether data would support this hypothesis.
What conclusion can you draw from the output?
The data provide sufficient evidence to reject H0 and to conclude that the mean depression score for male teens is larger than that of female teens.
The data provide sufficient evidence to conclude that male and female teens do not differ in mean depression score.
The data do not provide sufficient evidence to conclude that the mean depression score of male teens is larger than that of female teens.
The data do not provide sufficient evidence to reject H0, so we accept it, and conclude that male and female teens do…
Independent random samples of 32 people living on the west side of a city and 30 people living on the east side of a city were taken to determine if the income levels of west side residents are significantly different from the income levels of east side residents. Given the testing statistics below, determine if the data provides sufficient evidence to conclude that the income levels of west side residents are significantly different from the income levels of east side residents, at the 2% significance level.
H0:μw=μeHa:μw≠μe
t0=2.364
t0.01=±2.099
Select the correct answer below:
No; the test statistic is not between the critical values.
No; the test statistic is between the critical values.
Yes; the test statistic is not between the critical values.
Yes; the test statistic is between the critical values.
Chapter 15 Solutions
Statistics For Business And Economics, University Of Connecticut
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