1. A construction company that installs drywall wanted to investigate how a person's age affects how much drywall they can install in a week. On one hand, it would seem that the younger workers would be able to install more, but it seems that experience would also play a role. Two random samples were taken. Assume the distributions are normal.

Age 18-21 (sheets/week)	Age 25-28 (sheets/week)
92	104
109	116
93	96
81	104
115	108
109	108
84	116
121	112
94	120
116	108

1. Check the conditions.