(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Find the Z value that corresponds to the given area.

3. The attempt at a solution

What I did was go to Table E and find the closest number to 0.0166 which was 0.0160, and the Z numbers were 0.04 and 0.0. I then added them up together to get the answer of -0.04 (negative since it's less than 0) but it's wrong.The actual answer was: -2.13. I'm suspecting it's because the area is negative infinite to Z, and that's where I messed up at. Normally if it's between the median (which is 0) and Z, i would just add up both numbers.

Therefore, how do I solve this problem if the area is between infinite to Z?

2. The problem statement, all variables and given/known data

Find the z value to the left of the mean so that 98.87% of the area under the distribution curve lies to the right of it.

I didn't understand the wording of this problem at all, but I did give my attempt at drawing the graph (not sure if it's correct).

Actual Answer

The answer of this problem is:-2.28

Please help!!!

**Physics Forums - The Fusion of Science and Community**

# Statistics: Standard Normal Distribution

Have something to add?

- Similar discussions for: Statistics: Standard Normal Distribution

Loading...

**Physics Forums - The Fusion of Science and Community**