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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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RECIDIVISM

Report a Chi-Square test of Independence and use a 5% significance level.

Please answer this question regardless of whether you rejected the null hypothesis or not.

Refer to the standardized residuals given in the previous question. Which ONE of the following statements is TRUE?

Group of answer choices

Overall, it appears that group therapy is more successful in preventing recidivism than individual therapy, because lower-than-expected proportions of offenders who received group therapy went back to prison, whereas higher-than-expected proportions of offenders who received individual therapy went back to prison.

Overall, it appears that group therapy is more successful in preventing recidivism than individual therapy, because higher-than-expected proportions of offenders who received group therapy went back to prison, whereas lower-than-expected proportions of offenders who received individual therapy went back to prison.

Overall, it appears that individual therapy is more successful in preventing recidivism than group therapy, because lower-than-expected proportions of offenders who received individual therapy went back to prison, whereas higher-than-expected proportions of offenders who received group therapy went back to prison.

Overall, it appears that group therapy is less successful in preventing recidivism than individual therapy, because lower-than-expected proportions of offenders who received group therapy went back to prison, whereas higher-than-expected proportions of offenders who received individual therapy went back to prison.

Use the information below to answer the RECIDIVISM questions that
follow.
The data and segmented bar chart below are "data on recidivism, as
measured by re-arrest of persons who have committed at least one previous
offense." We are looking to see if recidivism rate is influenced by the type of
treatment received. (Recidivism means a return to criminal behavior.)
Data from "Statistics for Experimenters" by Box Hunter Hunter.
TREATMENT RECEIVED
OBSERVED COUNTS
No
Individual
Group
Total
Psychotherapy
Therapy
Therapy
Never back
12
20
41
in prison
Back in
prison
41
10
75
within one
RECIDIVISM
year
RATE
Back in
prison in 1-
25
13
70
10 years
Total
61
82
43
186
32
24

100%
Never back
Never back
Never back
in prison
in prison
in prison
90%
Back in prison
within one year
80%
Back in prison
within one year
70%
60%
Back in prison
within one year
50%
40%
Back in prison
in 1-10 years
Back in prison
in 1-10 years
30%
Back in prison
in 1-10 years
20%
10%
0%
No Psychotherapy Individual Therapy
Group Therapy
O 2020 Radha Bose Florida State University Department of Statistics

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