Homework Help: Statistics

Posted by Vicki on Tuesday, November 15, 2011 at 9:16pm.

There are 200 students in a sample. How many of these students will have scores that fall under the score of 41? Mean is 45, standard dev. is 4.

Statistics - PsyDAG, Wednesday, November 16, 2011 at 2:05am
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 the Z score. Multiply that proportion by 200.

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