cholastic Aptitude Test (SAT) scores are normally distributed with a mean of 500 points and a standard deviation of 100 points. what is the probablity of a student's scoring a 700 or above?

Question

cholastic Aptitude Test (SAT) scores are normally distributed with a mean of 500 points and a standard deviation of 100 points.  what is the probablity of a student's scoring a 700 or above?

anonymous · Answer

A little more than three percent.  This is a look-up from a z-score.  Manual calculation is possible, but way too hard.

anonymous · Answer

z = ( 700 - 500 ) / 100 = 2
Look up your z-score table with z= 2 for P !