Standard Normal Distribution

Question

For a standard normal distribution, find:

P(z < -1.19)

Answer 1

Probability of less than z=-1.19 is 0.11702 = 11.702%

use an on line z calculator, z tables, or a hand calculator with a statistic function

area under the normal curve = 0.11702 for less than z= -1.19

area under the curve for less than z= -1 can be estimated with the empirical rule as 68/4 = .17

for z =-1.19 has a smaller area. .11701 is a little less than .17