Asked by KIM
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 ?
Raw score Z score
68.0 ?
? –1.6
82.0 ?
? 1.8
69.0 ?
? –0.5
85.0 ?
? 1.7
72.0 ?
Answers
Answered by
Reiny
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
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
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