In: Statistics and Probability
A political science professor is interested in comparing the
academic achievement characteristics of students who vote...
A political science professor is interested in comparing the
academic achievement characteristics of students who vote in
national elections and those of those who do not vote. In a random
sample of 114 students who claim to have voted in the last
presidential election, you see a mean of the mean scores of 2.5 and
a standard deviation of 0.51. In an independent random sample of
123 students who have not voted, the mean of the mean scores is
2.97 and the standard deviation is 0.74.
The margin of error for the 98% confidence interval for the
difference in scores of students who vote and those who are
not;
Note: Suppose the scores are normal with unknown averages and
σ1 = σ2 unknown.