Perry Preschool Project. Analyze the data shown in Exercise 4 to determine wheth
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Perry Preschool Project. Analyze the data shown in Exercise 4 to determine whether a preschool program like the one used can lead to lower levels of criminal activity, and, if so, by how much. REFERENCE Perry Preschool Project. In a 1962 social experiment, 123 3- and 4-year-old children from poverty-level families in Ypsilanti, Michigan, were randomly assigned either to a treatment group receiving 2 years of preschool in participants were followed into their adult years. The following table shows how many in each group were arrested for some crime by the time they were 19 years old. (Data reported in Time, July 29, 1991). or to a control group receiving no preschool. The Arrested for some crime? No 42 30 Yes Peschool19 Control 32 (a) Is it possible to use these data to see whether preschool instruction can cause a lower rate of criminal arrest for some populations? (b) Is this a retrospective or a prospective study?Explanation / Answer
a) It is possibel to use these data to see whether preschool instruction can cause lower rate of criminal arrest for some populations.
becuase they give 2*2 contingency table for School and Arrested for some crime. Analyzing this data then we will able to see cause of lower rate of criminal arrest for some populations.
b) This is Prospective study, because in prospective study we observe outcome over a period of time and in reverse in retrospective we look back. In Retrospective study we fix back duration and we see if events happens or not.
In our problem, they following the students. So this study is Prospective study.
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