Problema Solution
Find the area under the normal curve for the condition.
Find the percent of the total area under the curve between z = -1.68 and z = 1.68
My answer = 0.93%
Answer provided by our tutors
You mean z = -1.86 and z = 1.86. Then, the percent of the total area under the curve between z = -1.86 and z = 1.86 is :
P(-1.86 =< z =< 1.86) = 2 P(0 =< z =< 1.86)
(use NORMAL DISTRIBUTION TABLE for z =1.86)
= 0.9372 or 93.72%
- And if you mean z =-1.68, z = 1.68. Then the percent of the total area under the curve between
z =-1.68 and z = 1.68 is
P(-1.68 =< z =< 1.68) = 2 P(0 =< z =< 1.86) = 0.907 or 90.07%