jawaher95 jawaher95

22-11-2020
Mathematics

contestada

What is the data value X if its z value is
-2 ,the mean is 27
and the standard deviation is 4

Respuesta :

miaisalpha miaisalpha

22-11-2020

The formula for this type of question is z=x-u/y
z=-2 (z-value)
u = 27 (mean)
y = 4 (standard deviation)

Therefore -2=x-27/4
You now figure this out like a normal equation

4x-2=4 X x-27/4
-8+27= x-27+27
19=x

Therefore the data value of x is 19

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