construct a 9 confidence interval about 1 2 statistics homework help

Assuming that both populations are normally​ distributed, construct a 90​% confidence interval about μ1 -μ2. ​(μ1 represents the mean of the experimental group and μ2 represents the mean of the control​ group.)

Experimental      Control

n 22                             16

xÌ„ 45.4                          40.7

s 4.1                             13.6

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

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