Posted by arron on Saturday, June 2, 2012 at 11:52am.
Z = (score-mean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores. Use the proportions between Z and mean and multiply by 400.
Related Questions
algebra - In a set of 400 values, the mean is 121 and the standard deviation is ...
math 3b - In a set of 400 values, the mean is 121 and the standard deviation is...
statistics - I.use the chebyshev's theorem to find out what percentage of ...
statistics - what are the mean and standard deviation of a sampling distribution...
math - Suppose x is a random variable with mean and standard deviation. If a ...
Math - Roughly speaking, the standard deviation indicates how far, on average, ...
Stats - I. Use Chebyshev’s theorem to find what percent of the values will ...
Math - I. Use Chebyshev’s theorem to find what percent of the values will ...
Math-Statistics - I. Use Chebyshev’s theorem to find what percent of the ...
Math-confused...plz help - I. Use Chebyshev’s theorem to find what percent ...
For Further Reading
