Question

A distribution follows a normal model. Find the z-score associated with the lowest 10% of the curve.
A) 2.32
B) -2.32
C) 1.28
D) -1.28

Answer 1

do you know the zscore?

Answer 2

well i know that 84% lie above z = -1
so i would say -1.28

Answer 3

From the table, z = -1.28.

http://www.oswego.edu/~srp/stats/z.htm