Suppose that you work as an analyst for a government agency, which funds various job
training programs.your boss Sam wishes to know the effectiveness of the training. Sam notices that the proportion of the employed among the 445 men after training is 69.2%, which is much greater than the
proportion of the employed before training (35.1%). Sam is unsure whether this increase in
employment rate is related to the training, or is simply a consequence of general
improvements in the job market. Sam posts the following questions.
(a) What are the major characteristics of the men in this data set (such as their age,
education level, employment status, and earnings if employed)?
(b) After the training program, is the average earnings of the employed with training
higher than the average earnings of the employed without training?
(c) After the training program, is the employment rate of the men with training higher
than the employment rate of the men without training?
(d) Do you have other ways to demonstrate the effect of training on employment?
“You should be able to find answers to these questions with some of your statistical skills that
you always boast about.” Sam demands cheerfully.

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