View Full Version : Math homework
scoughlin2
Jun 23, 2010, 08:55 AM
The lengths of pregnancies are normally distributed with a mean of 272 days and a standard deviattion of 20 days. If 64 women are randomly selected, find the probability that they have a mean pregancy between 272 days and 274 days
Just a quick question.
Curlyben
Jun 23, 2010, 09:30 AM
Thank you for taking the time to copy your homework to AMHD.
Please refer to this announcement: https://www.askmehelpdesk.com/finance-accounting/announcement-font-color-ff0000-u-b-read-first-expectations-homework-help-board-b-u-font.html
Unknown008
Jun 23, 2010, 09:51 AM
Use your knowledge of the Normal Distribution Curve.
Convert your values to the z value, and look up in your z table for the probabilities. Make a sketch of the curve to make sure that you are looking for the right area.