Question: It is claimed that an industrial safety program is effective in reducing the loss of working hours due to factory accidents. The following data are

It is claimed that an industrial safety program is effective in reducing the loss of working hours due to factory accidents. The following data are collected concerning the weekly loss of working hours due to accidents in six plants both before and after the safety program is instituted.

Do the data substantiate the claim? Use Î± = .05.

Plant 5 6 Before30 15 37 29 5 After10 29 16 35 26 16

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