contestada

a set of 1000 values has a normal distribution. The mean of the data is 120 and the standard deviation is 20

Respuesta :

BlueSky06

In order to find 90%, you need to look for 90% on a normal distribution curve, which has a z-score of 1.29.


The solution would be like this for this specific problem:

 

-120 / 20 = 1.27


You would require 145.4 and 90% lie under that point.

Otras preguntas

Q&A Education