z score = (your data value - mean)/sd
I will do the first and fourth, follow the same procedure for the others
68, ?
z = (68-70)/8 = -2/8 = -.25
? 1.8
1.8 = (x - 70)/8
multiply by 8
14.4 = x-70
add 70
84.4 = x
notice the z value may be ±
but your data value must be positive for your problem
For the following set of scores, fill in the cells. The mean is 70 and the standard deviation is 8.
Raw score Z score
68.0 ?
? –1.6
82.0 ?
? 1.8
69.0 ?
? –0.5
85.0 ?
? 1.7
72.0 ?
1 answer
1 answer