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Previously 4 of mothers smoked more than 21 cigarettes during their pregnancy An obstetrician believes...

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Previously 4 of mothers smoked more than 21 cigarettes during their pregnancy An obstetrician believes that the percentage of mothers who smoke 21 cigarettes or more is today She randomly selects 120 pregnant mothers and finds that 2 of them smoked more cigarettes during pregnancy Test the researcher s statement at the a 0 05 level c gnificance hat are the null and alternative hypotheses versus H pe integers or decimals Do not round Cause npo 1 Po P value und to one decimal place as needed 10 the normal model be used to approximate

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