Suppose a test has a split-half reliability coefficient (r) of 0.60. Using the Spearman-Brown prophecy formula, what would be the estimated reliability coefficient of the full-length test?
1
0.60
2
0.70
3
0.75
4
0.80
Suppose a test has a split-half reliability coefficient (r) of 0.60. Using the Spearman-Brown prophecy formula, what would be the estimated reliability coefficient of the full-length test?