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Chapter 10: Problem 60

Suppose you randomly assign some parolees to check in once a week with their parole officers and others to check in once a month, and observe whether they are arrested within 6 months of starting parole.

Short Answer

Expert verified
An experimental group setup will be implemented to assess the correlation between the frequency of parolee check-ins and their likelihood of being arrested within 6 months. Results will be analyzed for significant differences between parolees who have a weekly check-in regime, versus those who only check in on a monthly basis.

Step by step solution

01

Define the Groups

The first step is to establish the two groups. Group 1 includes parolees who are required to check in with their parole officers once per week. Group 2 includes parolees who are required to check in with their parole officers once per month.
02

Set Up the Experiment

In order to make the comparing valid, the parolees should be assigned randomly to each group ensuring that any results are not biased by the selection of a particular group. Parolees can be assigned using simple random sampling techniques.
03

Follow-Up and Record

For each parolee, there will be a follow-up of 6 months, in which it will be recorded whether they are arrested or not. These arrest incidents are the primary data that will be used to compare the two groups.
04

Comparison of The Results

Once the data for each group is collected and recorded, a comparison needs to be carried out. This can be an observational analysis to see if there is a difference in the number of arrests between the two groups over the 6-month testing period.
05

Analyze the Results

Now the results need to be analyzed. This is typically performed using statistical analysis such as testing for statistical significance where the null hypothesis is that the difference in arrest rates is due to random chance.

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