66 Caesarian births. The American College of Obstetricians and Gynecologists reports that 32% of all births in
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66 Caesarian births. The American College of Obstetricians and Gynecologists reports that 32% of all births in the United States take place by Caesarian section each year.
( National Vital Statistics Reports , Mar. 2010).
a. In a random sample of 1,000 births, how many, on average, will take place by Caesarian section?
b. What is the standard deviation of the number of Caesarian section births in a sample of 1,000 births?
c. Use your answers to parts a and b to form an interval that is likely to contain the number of Caesarian section births in a sample of 1,000 births.
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