Find the area under the standard normal curve that lies between

Question

z = −2.30 and z = 1.08

Answer 1

about 88.5% = .855= area under the curve between z = -2.3 and 1.08

use a z calculator, on line or a handheld with stat functions

you could also do a very rough estimate with the empirical rule. 2.3 is close to 2

1.08 very close to 1, so add .68/2 + .95/2 = .34+.475 = .815

that's actually fairly close to .855, just .04 difference