Mathematics, 04.02.2020 21:50 cpcoolestkid4
Previously, 44% 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 less than 44% today. she randomly selects 120120 pregnant mothers and finds that 33 of them smoked 21 or more cigarettes during pregnancy. test the researcher's statement at the alpha equals 0.05α=0.05 level of significance.
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Previously, 44% of mothers smoked more than 21 cigarettes during their pregnancy. an obstetrician be...
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