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Refer to given Exercise. What is the variance of head circumferences of adult males?

Exercise
Head circumferences of adult males have a bell-shaped distribution with a mean of 56 cm and a standard deviation of 2 cm.

a. Explain whether or not it would be unusual for an adult male to have a 52-cm head circumference.

b. Explain whether or not it would be unusual for an adult male to have a 62-cm head circumference.

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