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 150 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? Họ: P = 0.05 versus H,: p < 0.05 (Type integers or decimals. Do not round.) Because npo (1- Po) = 7.1 < 10, the normal model may not be used to approximate the P-value. (Round to one decimal place as needed.) Find the P-value. P-value = (Round to three decimal places 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 150 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 H1: P
Но: р
(Type integers or decimals. Do not round.)
0.05
Because npo (1- Po) = 7.1 < 10, the normal model may not be used to approximate the P-value.
(Round to one decimal place as needed.)
Find the P-value.
P-value =
|(Round to three decimal places 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 150 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 H1: P Но: р (Type integers or decimals. Do not round.) 0.05 Because npo (1- Po) = 7.1 < 10, the normal model may not be used to approximate the P-value. (Round to one decimal place as needed.) Find the P-value. P-value = |(Round to three decimal places as needed.)
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