Data were collected on lost-time accidents (mean work-hours lost per month over a period of 1 year) before and after an

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Data Were Collected On Lost Time Accidents Mean Work Hours Lost Per Month Over A Period Of 1 Year Before And After An 1 (105.79 KiB) Viewed 94 times

Data were collected on lost-time accidents (mean work-hours lost per month over a period of 1 year) before and after an industrial safety program was put into effect at six industrial plants. Plant Number 1 2 3 4 5 6 40 62 43 69 59 28 Before Program After Program 33 60 43 63 50 30 in USE SALT Do the data provide sufficient evidence to indicate whether the safety program was effective in reducing lost-time accidents? Test using a = 0.01. (Use "before-after = Md) State the null and alternative hypotheses. OHO: Mg = 0 versus H: Mo<0 O versus H: Md > 0 O Hoito O Ho: Mo = 0 versus Ha: > 0 O Ho: Mo O versus H: Mg = 0 O Ho: M = 0 versus H: 470 State the test statistic. (Round your to three deci places.) t = State the rejection region. (If the test is one-tailed, enter NONE for the unused region. Round your answers to three decimal places.) t> t < State the conclusion. OH, is rejected. There is insufficient evidence to indicate that the safety program was effective in reducing lost-time accidents. OH, is not rejected. There is insufficient evidence to indicate that the safety program was effective in reducing lost-time accidents. OH, is not rejected. There is sufficient evidence to indicate that the safety program was effective in reducing lost-time accidents. OH. is rejected. There is sufficient evidence to indicate that the safety program was effective in reducing lost-time accidents.