Between z = -2 and z = 0.4.

(Points: 5)
0.655
0.977
0.477
0.155
0.633
my answer was o.155 is this correct

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

None of those alternatives are exactly correct, but one is close and it's not your answer.

my answer is 0.633 is this correct , it not exact but closer

To determine whether your answer of 0.155 is correct, we need to find the area under the standard normal distribution curve between z = -2 and z = 0.4.

To find this area, we can use a standard normal distribution table or a statistical calculator.

If you use a standard normal distribution table, you will need to locate the z-score corresponding to z = -2 and z = 0.4 and then find the corresponding probabilities.

For z = -2, the corresponding probability is 0.0228.
For z = 0.4, the corresponding probability is 0.6554.

To find the area between these two z-scores, we subtract the smaller probability from the larger probability:

0.6554 - 0.0228 = 0.6326

Therefore, the correct answer is 0.633, not 0.155.

So, your answer of 0.155 is incorrect. The correct answer is 0.633.