if a set of observations is normally distributed, then the percentage of observations from mean by less than 0.52 (standared deviation)

Question

options

a) 69.85             b) 90.32%

c) 39.7%            d) none

Answer 1

Hello, thank you for taking the time to post your question!

Essentially what the question is asking here is what the odds are of the Z value being between -0.52 and +0.52.

If you plug that into technology like Microsoft Excel I find the score to be 39.70%, which matches answer choice (c).

Hopefully that gets you moving in the right direction! Feel free to reach out if you have any questions beyond that on the simplification :)