Assuming that both populations are normally distributed, construct a 95% confidence interval about 12. (1 represents the mean of the experimental group and 2 represents the mean of the control group.)

Experimental Control

n 30 22

x overbarx 48.1 46.2

s` 6.7 12.6

The confidence interval has a lower bound of_____ and an upper bound of _____ .

(Use ascending order. Round to two decimal places as needed.)