CRM 204 Lecture Notes - Lecture 3: Interrupted Time Series, Null Hypothesis, Random Assignment
28 Nov 2013
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Crm 204 introduction to criminal justice research and statistics (september 19, 2012) Introduce claims, concerns and issues: ask for reactions: focus further information on above relating to areas of disagreement, negotiate with stakeholders about information collected, attempt to gain consensus. Independent and dependent variables (length of prison sentence -> re-offending rates) Confounding variables -->(see class hand-out; variables in hypothesis testing) Is logically linked to a research question and theory. Is falsifiable; capable of being tested against empirical evidence and shown to be true or false. Null hypothesis measured variables significant change you reject the null hypothesis. A null hypothesis is a hypothesis that states that there is no relationship between the two. You accept or reject the null hypothesis based on your data. The alternative hypothesis is one that states that there is a relationship between the two variables. Groups are not created by random assignment. Comparison group selected to be as comparable as possible to treatment group.
