# The mean pregnancy length of new mothers in a population is 267 days with a standard deviation of 10 days. Out of 250 randomly selected new mothers, about how many would you expect to have had a pregnancy greater than 287 days? Use the Standard Normal Distribution.

Question
1 views

The mean pregnancy length of new mothers in a population is 267 days with a standard deviation of 10 days. Out of 250 randomly selected new mothers, about how many would you expect to have had a pregnancy greater than 287 days? Use the Standard Normal Distribution.

check_circle

Step 1

The pregnancy length of new mothers is normally distributed with mean 267 days and standard deviation 10 days.

The z score for the value 287 is 2 which can be calculated as follows:

Step 2

The probability that a randomly selected new mother had a pregnancy greater than 287 days can be obta...

### Want to see the full answer?

See Solution

#### Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in