#### Sun

##### New member
A manufacturing firm recently instituted an occupational safety program
designed to reduce lost time due to on-the-job accidents. In the 50 months
prior to the safety program, lost time due to accidents averaged 99 hours per
month, with a standard deviation of 12 hours per month. In the 48 months
since the program began, employee lost time due to on-the-job accidents has
averaged 91 hours per month, with a standard deviation of 14 hours per
month.

Perform a hypothesis test to test the claim that the safety program is effective
in reducing lost time due to on-the-job accidents. Use a = 0.01

#### tkhunny

##### Moderator
Staff member
$$\displaystyle H_{0}$$: Average Lost time due to accidents is 99 hrs / month.

#### Sun

##### New member
Could you please just show me the outline of what to do?
I am confused.