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posted by jenny .
the head circumferences of adult males have a bellshaped distribution with the mean= 65cm and standard deviation =2cm.
a. what is the head circumference such that only 2.5% of adult males have a smaller head circumference?
b. what is the head circumference such that only 2.5% of adult males have a larger head circumference?
c. what is the head circumference such that only 16% of adult males have a larger head circumference?

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