mean 12.2, standard dev 2.5: what prop. of pop. is under 10?  TOPIC_SOLVED

Standard deviation, mean, variance, z-scores, t-tests, etc.

mean 12.2, standard dev 2.5: what prop. of pop. is under 10?

Postby rushange on Tue Jun 01, 2010 5:22 am

A normal population has a mean of 12.2 and a standard deviation of 2.5. What proportion of the population is less than 10.0
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Postby stapel_eliz on Tue Jun 01, 2010 12:04 pm

rushange wrote:A normal population has a mean of 12.2 and a standard deviation of 2.5. What proportion of the population is less than 10.0

What is the z-score for 10.0? What percentage is this?

The z-Score

How Do You Calculate z-Score / Sigma Level?

Standard Normal Distribution
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