Posted by Joyce on .
According to classical test theory, if the observed variance of a test is 50 and the true variance is 40, what is the estimated reliability of the test?
Answer
a.
0.40
b.
0.50
c.
0.80
d.
0.90

statictics 
MathGuru,
The ratio of true score variance to the observed score variance: 40/50 = 0.80

statictics 
Anonymous,
0.80

statictics 
liz,
The ABC SelfConcept Inventory has a splithalf reliability coefficient of 0.90, and the XYZ SelfConcept Inventory has a SpearmanBrown reliability coefficient of 0.90. If all other factors are equal, which instrument would you choose to use?

statictics 
bill,
Either one

statictics 
Kishma,
0.40