Posted by Huffette on Sunday, December 2, 2012 at 7:16pm.
A set of 50 data values has a mean of 48 and a variance of 9.
I. Find the standard score (z) for a data value = 43.
II. Find the probability of a data value < 43.

Homework Help  PsyDAG, Tuesday, December 4, 2012 at 1:26pm
Z = (scoremean)/SD
SD = √variance
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score.

Statistics  PsyDAG, Tuesday, December 4, 2012 at 1:27pm
Indicate your subject in the "School Subject" box, so those with expertise in the area will respond to the question. You lucked out this time.
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