1) Find the following Z-scores from Table IV:

 

(a) Area to the left is .9099

(b) Area to the right is .9394

(c) Area to the left is .1141

(d) 76% centered about the mean.

 

2) A study found that Math SAT scores follow a normal curve.  The mean Math score is a 525 with a standard deviation of 95. 

 

(a) What score represents the 75th percentile?

(b) What score represents the 1st quartile?

(c) What score would represent the lowest score to be considered in the top 10 percent?