The Cambridge Study of delinquent development was undertaken in N. London to inv
ID: 3264697 • Letter: T
Question
The Cambridge Study of delinquent development was undertaken in N. London to investigate the links between criminal behavior in young men and socioeconomic factors of the upbringing. A cohort of 395 boys was followed for about 20 years starting at the age of 8 or 9. All boys attended 6 schools located near the research office. The table below provides the following summary statistics relating family income and convictions. Can the cohort of the 395 boys be considered a random sample? Construct the mosaic plot of these data. What can we conclude from the mosaic plot regarding family income and its influence on teenage and young adult male delinquency?
Explanation / Answer
Yes we can say the cohort of the 395 boys be considered a random sample.
In mosaic plot, the area of each box is proportional to the relativefrequency of that combination of variables in the whole data set. Thus, the mosaic plot for the data shows that the adequate income was higher in the no covictions group than in the convicted group.