The data on the right represent the number of live multiple-delivery births (thr

Question

The data on the right represent the number of live multiple-delivery births (three or more babies) in a particular year for women 15 to 54 years old. Use the data to determine the following. Determine the probability that a randomly selected multiple birth for women 15-54 years old involved a mother 30 to 39 years old. Determine the probability that a randomly selected multiple birth for women 15-54 years old involved a mother who was not 30 to 39 years old. Determine the probability that a randomly selected multiple birth for women 15-54 years old involved a mother who was least than 45 years old. Determine the probability that a randomly selected multiple birth for women 15-54 years old involved a mother who was at least 20 years old.

Explanation / Answer

a.P(30 to 39)

=P(30 to 34)+P(35 to 39)

=2829/(94+510+…+117)+1855/7401

=0.63

b.P(not 30 to 39)

=1-0.63

=0.37

c.P(less than 45)

=(94+…+372)/7401

=0.98

d.P(at least 20)

=P(20 to 24)+…+P(45 to 54)

=(510+…+117)/7401

=0.987

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