Question

1. The length of human pregnancies varies according to a distribution that is approximately normal with...

1. The length of human pregnancies varies according to a distribution that is approximately normal with mean 266 days and standard deviation 16 days.

a) Sketch a normal curve on which the mean and standard deviation are correctly located. (It is easiest to draw the curve first, locate the inflection points, then mark the horizontal axis.)

b) How long are the longest 2.5% of pregnancies?
c) What percentage of human pregnancies are longer than 266 days?

d) What percentage of human pregnancies are longer than 234 days?

e) What percentage of human pregnancies are longer than 282 days?

Math   Statistics-And-Probability   
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Answer #1

Given Information

Mean = 266

standard deviation = 16

a

Normal distribution curve is shown below

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