ly, 5% of mothers smoked more than 21 cigarettes during their pregnancy. An obstetrician believes that the percentage of mothers who smoke 21 cigarettes 5 of them smoked 21 or more cigarettes during pregnancy. Test the researcher's statement at the a = 0.05 level of significance. the null and alternative hypotheses? = 0.05 versus H,: P < 0.05 egers or decimals. Do not round.) npo (1- Po) =O < 10, the normal model may not be used to approximate the P-value. o one decimal place as needed.)

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Previously, 5% 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 5% today. She randomly selects 140 pregnant mothers and
finds that 5 of them smoked 21 or more cigarettes during pregnancy. Test the researcher's statement at the a = 0.05 level of significance.
What are the null and alternative hypotheses?
= 0.05 versus H,:
Họ: P
(Type integers or decimals. Do not round.)
0.05
Весause npo (1 - Pо) -D
< 10, the normal model may not be used to approximate the P-value.
(Round to one decimal place as needed.)
Transcribed Image Text:Previously, 5% 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 5% today. She randomly selects 140 pregnant mothers and finds that 5 of them smoked 21 or more cigarettes during pregnancy. Test the researcher's statement at the a = 0.05 level of significance. What are the null and alternative hypotheses? = 0.05 versus H,: Họ: P (Type integers or decimals. Do not round.) 0.05 Весause npo (1 - Pо) -D < 10, the normal model may not be used to approximate the P-value. (Round to one decimal place as needed.)
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