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Part 1

Distributions of gestation periods (lengths of pregnancy) for a particular animal are roughly bell-shaped. The mean gestation period for this animal is

264

days, and the standard deviation is

5

days for females who go into spontaneous labor. Which is more unusual, a baby being born

10

days early or a baby being born

10

days late? Explain.

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Part 1

Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice.

A.

A baby being born

10

days early is more unusual because its corresponding z-score,

enter your response here,

is further from 0 than the corresponding z-score of

enter your response here

for a baby being born

10

days late.

(Type integers or decimals rounded to two decimal places as needed.)

B.

A baby being born

10

days late is more unusual because its corresponding z-score,

enter your response here,

is further from 0 than the corresponding z-score of

enter your response here

for a baby being born

10

days early.

(Type integers or decimals rounded to two decimal places as needed.)

C.

Both events are equally likely.