|
Comparing Scores in Your Group with Scores in Another Group -
Percentile Rank of Average Student,
Sample Size Known
|
|
Data
for Your Group
|
|
|
a) Percentile rank of average
score
|
|
|
b) Number of students tested
|
|
|
Data for the Comparison Group
|
|
|
a) Percentile of average score
|
|
|
b) Number of students tested
|
|
|
Results
|
|
|
Effect Size
|
|
|
Improvement Index
|
|
|
Probability
this effect would occur by chance
|
|