Q1) Use X2 goodness-of-fit test to test claim about population distribution. Interpret decision in context of the original claim.
Legal researcher is studying age distribution of juries by comparing them with overall age distribution of available jurors. Researcher claims that jury distribution is different from overall distribution; i.e., there is noticeable age bias in jury selection in this area. Table illustrates number of jurors at county court in 1 year and percent of persons residing in that county, by age. Use population distribution to determine expected juror frequencies. Test researcher's claim at a = 0.01.
|
|
21-29
|
30-39
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40-49
|
50-59
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60 and above
|
|
Jury
|
45
|
128
|
244
|
224
|
359
|
|
Population
|
20.5%
|
21.7%
|
18.1%
|
17.3%
|
22.4%
|