For a standard normal distribution, find: P(z > -0.44)

Question

For a standard normal distribution, find:

P(z > -0.44)

Answer 1

You can use Z-table or Technology like TI-84.

Z-table:

Z-table shows probability to the left of the z-score. Some tables are different, Look at the Normal Density Curve on the top of the Z-table.

P ( Z > -0.44 ) = 1 - P ( Z < -0.44 ) = 1 - 0.33 = 0.67 = 67 %

In Z-table look at the first column under Z for -.4 and first row for 0.04 the intersection inside the table gives you the probability for z < -0.44 which is 0.33 .

TI-84 : For Standard Normal Distribution, Z-table, average Mu = 0 and Standard Deviation Sigma=1 always.

press 2ND, VARS

Choose 2: nolmalcdf (

Lower: -0.44

Upper: 9999

mu: 0

Sigma: 1

Paste Press Enter

Enter

It will give you the answer. 0.6700314207