Homework Help: statistics

Posted by Jean on Friday, September 9, 2011 at 11:06pm.

Suppose you administered an anxiety test to a large sample of people and obtained normally distributed scores with a mean of 45 and standard deviation of 4
There are 200 students in a sample. How many of these students will have scores that fall under the score of 41?

statistics - PsyDAG, Saturday, September 10, 2011 at 1:26pm
Z = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to that Z score. Multiply by 200.

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