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by rushange
Tue Jun 01, 2010 5:22 am
Forum: Statistics
Topic: mean 12.2, standard dev 2.5: what prop. of pop. is under 10?
Replies: 1
Views: 5019

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

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
by rushange
Tue Jun 01, 2010 5:19 am
Forum: Statistics
Topic: mean 80, standard dev 14: 80% of values above what value?
Replies: 1
Views: 3781

mean 80, standard dev 14: 80% of values above what value?

A normal distribution has a mean of 80 and a standard deviation of 14. Determine the value above which 80 percent of the values will occur.

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