[SPLIT] z-scores of middle 70%, top 3%, bottom 4%

[wiishesssss]

Awesome. Thank you for helping me with "what proportion of the distribution is between a z-score of 1.65 to 2.65?"

If you don't mind I have a few other questions ..

1) What's the z-score that is the middle 70%?

1 - 0.7 = .3

0.3 / 2 = 0.15

Do you do the invNorm(0.15) = -1.04

So the answer is -1.04 to 1.04

2) What is the z score of the top 3%?

1 - 0.03 = 0.97

invNorm (0.97) = 1.88

and lastly ..

3) What is the z score of the bottom 4%?

invNorm(0.04) = -1.75

I hope those are correct

 

[wiishesssss]

can anyone give me a confirmation if the math that i did above is correct for those 3 problems


thank you

 

[galactus]

Yep, they look OK.