Posted by Johnny on Sunday, October 31, 2010 at 4:11am.
Scores on the verbal section of the SAT have a mean of 500 and a standard deviation of 100. If someone scored at the 90th percentile, what is their SAT score?

Statisitcs  Johnny, Sunday, October 31, 2010 at 4:11am
Can someone show me how to find this equation to this problem?
Scores on the verbal section of the SAT have a mean of 500 and a standard deviation of 100. If someone scored at the 90th percentile, what is their SAT score?

Statistics  PsyDAG, Sunday, October 31, 2010 at 11:50am
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the Z score related to that proportion.
Z = (scoremean)/SD
Insert the values and solve for the score.
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