Organizations interested in making sure that accused persons have a trial of their peers often compare the distribution of jurors by age, education, and other socioeconomic variables. One such study in a large southern county provided the following information on the ages of 1,000 jurors and the age distribution countywide.

a. Display the above data using appropriate graphs.
b. Is this significant evidence of a difference between the age distribution of jurors and the countywide age distribution?
c. Does there appear to be an age bias in the selection of jurors?

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Age Total 51-60 158 15.7 Over 60 212 19.3 41-50 21-40 399 42.1 1,000 100 Number of jurors Age 90 countywide 22.9