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Pregnancy_Continued_f10

# Pregnancy_Continued_f10 - Let A = the event that the baby...

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Statistics 3011, Course Notes Supplement 3 October 4, 2010 Pregnancy Continued Suppose that nationwide, 41% of all babies from Frst pregnancies are born before the 40th week, and 62% of all babies from Frst pregnancies are born before the 41st week. Note: The numbers in bold were calculated from the mean and standard deviation given in the Empirical Rule handout and the assumption that the gestational length of pregnancies follows a normal distribution. We will learn how to calculate these numbers in Chapter 6.
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Unformatted text preview: Let A = the event that the baby is born before the 40th week Let B = the event that the baby is born before the 41st week a) When the pregnancy begins, what is the probability that the baby will be born during the 40th week? b) If the baby has not been born before the 40th week, what is the probability the baby will be born during the 40th week? 1...
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