What percentage of the area of the standard normal distribution is between z = -1.00 and z = +1.00? How do you know this?

Answer 1

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores.

Answer 2

68%

Answer 3

=P(-1.00<1.00)
=0.3413+0.3413
=0.6826 or 68.26%
Therefore, 68.26% is the percentage.

Answer 4

z = 1.00 *