1. A psychologist claims that the number of repeat offenders will decrease if firsttime offenders complete a particular rehabilitation course. You randomly select 10 prisons and record the number of repeat offenders during a two-year period. Then, after first-time offenders complete the course, you record the number of repeat offenders at each prison for another two-year period. The results are shown in the following table. At 0.05 significance level, can you support the psychologist's claim? Before 21 34 9. 30 54 36 33 40 After 19 22 16 31 21 30 22 18 17 21 37 45
1. A psychologist claims that the number of repeat offenders will decrease if firsttime offenders complete a particular rehabilitation course. You randomly select 10 prisons and record the number of repeat offenders during a two-year period. Then, after first-time offenders complete the course, you record the number of repeat offenders at each prison for another two-year period. The results are shown in the following table. At 0.05 significance level, can you support the psychologist's claim? Before 21 34 9. 30 54 36 33 40 After 19 22 16 31 21 30 22 18 17 21 37 45
College Algebra (MindTap Course List)
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Transcribed Image Text:Solve the following problems according to the proper test to be used:
1. A psychologist claims that the number of repeat offenders will decrease if firsttime offenders complete a particular
rehabilitation course. You randomly select 10 prisons and record the number of repeat offenders during a two-year period.
Then, after first-time offenders complete the course, you record the number of repeat offenders at each prison for another
two-year period. The results are shown in the following table. At 0.05 significance level, can you support the psychologist's
claim?
Before 21
34
45
30
54
37
36
33
40
After
19
22
16
31
21
30
22
18
17
21
2. In a before and after experiment the responses obtained from 300 respondents were classified as follows:
After Treatment
Before Treatment
Do not favour
Favour
Favour
70 = A
80 = B
Do not favour
110 = C
40 = D
Test at 5% significance level, using McNemar test if there is any significant difference in the opinion of people after the
treatment. Use alpha = 0.05.
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