the area between z= -0.29 and z= 2.26 is

Answer 1

0.60218 = 60.218%

use z tables or z calculator

from the mean to z=2.26 is 0.48809

from z=-0.29 to the mean is 0.11409

.48809+.11409 = .60218

using the empirical rule, from z=0 to z=2.26 is a little more than about .95/2 = .475

.48809 looks like it's in the right range of values'

using the empirical rule from z=-0.29 to z=0 is far less than .68/2 =.34