Question: The National Center for Health Statistics reported the following data

The National Center for Health Statistics reported the following data on the number of children born in individual pregnancies in 1996 and 2006 (The World Almanac, 2010):


a. Define a random variable x = number of children born in a single pregnancy in 1996 and develop a probability distribution for the random variable. Let x = 5 represent quintuplets or more.
b. Compute the expected value and variance for the number of children born in a single pregnancy in 1996.
c. Define a random variable y = number of children born in a single pregnancy in 2006 and develop a probability distribution for the random variable. Let y = 5 represent quintuplets or more.
d. Compute the expected value and variance for the number of children born in a single pregnancy in 2006.
e. Do these data support the conclusion that the increased use of fertility drugs by older women has generated an upward trend in multiplebirths?


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  • CreatedDecember 30, 2013
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