Answer:
Z-score = 0.1764 ≈ 0.18
Step-by-step explanation:
Z-score for Total probability of 0.86
This can found as shown below
P( Z < -Z ) + P( Z > Z ) = 0.86
= P ( Z < -Z ) + P ( Z < - Z ) = 0.86
= P ( Z < - Z ) = 0.86 / 2 = 0.43
hence Z-score = 0.1764 ( from standard Normal table )
