Barrons Book
Chp4
The mean and standard deviation for SAT math scores are shown in the table below for five high
schools in a large city. A particular score for each city is also shown (in the right column).
School Mean Standard Deviation Single Score
A 532 24 600
B 485 30 560
C 515 22 561
D 396 26 474
E 479 35 552
Which single score has the highest z-score?
(A) 474 in school D
(B) 552 in school E
© 560 in school B
(D) 561 in school C
(E) 600 in school A
z-score = (single score - mean)/(standard deviation), so for each choice, plug in the three values to compute each z-score.
@MITer94 The Ans should be A right?
In Barron’s it’s given as D.
@UAS998 yes, the answer is (A) 474 in school D, which has a z-score of 3.
Funny how the individual scores are not multiples of 10. So there’s a double fail.
@MITer94 Thanks for the help.