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Unformatted text preview: — reminder And as always, if the pvalue is smaller than (or equal to) the chosen significance level α , then the difference is statistically significant and we reject H . A national survey by the National Institute for Occupational Safety and Health on restaurant employees found that 75% said that work stress had a negative impact on their personal lives. You investigate a restaurant chain to see if the proportion of all their employees negatively affected by work stress differs from the national proportion p = 0 . 75. H : p = p = 0.75 vs. H a : p ≠ 0.75 (2 sided alternative) In your SRS of 100 employees, you find that 68 answered “Yes” when asked, “Does work stress have a negative impact on your personal life?” Is this result significant at the 5% level?...
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 Spring '08
 ABDUS,S.
 Statistical hypothesis testing, 5%, 75%, National Institute for Occupational Safety and Health

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