Mathematics, 25.11.2021 14:10, antboozeoszxej
Previously, 3% 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 3% today. She randomly selects 150 pregnant mothers and finds that 3 of them smoked 21 or more cigarettes during pregnancy.
Required:
Test the researcher's statement at the α=0.05 level of significance.
Answers: 2
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Previously, 3% of mothers smoked more than 21 cigarettes during their pregnancy. An obstetrician bel...
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