Abstract
The team is transitioning from Tests of Association to Tests of Difference in this chapter. The team is wrestling with two tests that are used with only one sample. The two research questions that are addressed are as follows: (1) Is there a difference between the Probability that sex offenders will take medication and the Probability that sex offenders will not take medication? (2) Is there a difference between the Observed Frequency of sex offender registration and the Expected Frequency of offense for three registration categories: home address, conditional, and undisclosed? The first of these research questions is addressed by using the Binomial Test, and the second is addressed by using the Chi-Square Goodness of Fit Test. Despite some disturbing and politically hazardous news, the team must rally together to plow through these two research questions.
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Notes
- 1.
Revisit the discussion on page 7 in Chap. 1 regarding control groups for more information.
- 2.
Normal distributions are considered at length beginning on page 24 in Chap. 2.
- 3.
A discussion about how to use a table (specifically the Chi-Square Table) can be found on page 85 in Chap. 4.
- 4.
A discussion about the use of Chi-Square occurs on page 76 in Chap. 4 regarding the Cramér Coefficient.
- 5.
California Department of Justice, Office of the Attorney General (2013a)
- 6.
California Department of Justice, Office of the Attorney General (2013a, 2013b); percentages calculated by dividing the number of registrants in the category by the total number of registrants in the full address, zip code/conditional, undisclosed, and excluded categories found in published statistics
- 7.
Descriptions of the offenses in each category can be found in California Penal Code § 290.46 subsections b (home address category), c (conditional home address category), and d (zip code category). Offenders who are convicted of offenses not specified in these subsections are still required to register with the police, but they are part of the undisclosed category and are not displayed on the Internet.
- 8.
The Chi-Square critical value table can be found in the appendix Table L.
References
California Department of Justice, Office of the Attorney General (2013a). California sex registrant statistics. Retrieved from http://www.meganslaw.ca.gov/statistics.aspx?lang=ENGLISH
California Department of Justice, Office of the Attorney General (2013b). Summary of California law on sex offenders. Retrieved from http://www.meganslaw.ca.gov/ registration/law.aspx?lang=ENGLISH
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Linebach, J.A., Tesch, B.P., Kovacsiss, L.M. (2014). X Marks the Spot Revisited. In: Nonparametric Statistics for Applied Research. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-9041-8_8
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