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- December 3rd 2009, 03:28 AM #1

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- Feb 2009
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## Please Help 1

1. Assume blood pressure readings are normally distributed with a mean of 120 and standard deviation of 8. What percentage of people have a blood pressure reading greater than 145?

2. Assume that the salaries of elementary school teachers in the United States are normally distributed with a mean of $41,000 and a standard deviation of $4,000. What is the cut-off salary for teachers in the bottom 10%?

I greatly appreciate any one's help. These are problems I have struggled with this semester....and now that the end is winding down I would love to figure them out for future references. Thank so much to everyone!

- December 3rd 2009, 04:00 AM #2

- December 3rd 2009, 04:09 AM #3

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