Mean Number of Years of Education by Class

Mean

St Dev

N

Working class

12.8

2.85

697

Middle class

14.45

3.08

626

Using the above data, construct a 95% confidence interval for education for both

working

AND

middle class

.

Now construct a 99% confidence interval for

both.

How does the size of the confidence interval change as our confidence in the results

increase?

UPLOAD ALL YOUR WORK.