For seniors at Fallbury HS, the mean SAT math score 550 with a std.dev of 57
If an engineering school will only accept students with SAT math score in the top 22%,What is the minimum SAT math score for this program?
Solution :
Given that ,
mean =
= 550
standard deviation =
= 57
The z- distribution of 22% is
P( Z > z ) = 22%
1 - P( Z < z ) = 0.22
P(Z < z ) = 1 - 0.22
P( Z < z ) = 0.78
P( Z < 0.77 ) = 0.78
z = 0.77
Using z - score formula ,
X = z*
+
X = 0.77*57 + 550
= 43.89 + 550
= 593.89
The minimum SAT math score for this program is 593.89
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