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July 23, 2014

July 23, 2014

Posted by **devon** on Friday, November 14, 2008 at 10:55pm.

a) more than 162 lbs?

b) more than 155 lbs?

c) less than 172.5 lbs?

d) between 158.5 lbs and 169 lbs?

- math -
**drwls**, Saturday, November 15, 2008 at 2:04ama) 50%

b) 97.7%

c) 99.9%

d) 81.9%

These answers were obtained using the normal disribution calculation tool at

http://psych.colorado.edu/~mcclella/java/normal/accurateNormal.html

I did not make use of the fact that the mean and standard deviation were obtained from 90 samples. I assumed 162 was the true mean and 3.5 was the true std deviation.

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