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IS. The following are the average weekly losses of worker-hours due to aoeidents in II} industrial plants before and after a certain safety program was

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IS. The following are the average weekly losses of worker-hours due to aoeidents in II} industrial plants before and after a certain safety program was put into operation. Ham-*3: 45 T3 45 1 24 33 5? 83 34 26 1? Anal? 35 ED 44 1 1H 35 51 it? 29 24 1 1 Use 5% level of significance to test whether the safety program is effective

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