Percentiles Flashcards
1
Q
What is a pecentile?
A
A point or position on a continuous scale of 100 such that a certain fraction of the population of raw scores lies at or below that point
2
Q
Why are percentiles useful?
A
They use a standard score
3
Q
What is a standard score?
A
A score that is derived from raw data and has a known basis for comparison
Commonly used in clinical and educational settings
4
Q
What do standard scores allow us to do?
A
- Evaluate raw scores
- Compare two sets of scores that have different units
5
Q
Common percentile divisions
A
Quartiles and deciles
6
Q
Determining a score from a percentile
A
Set a cutoff at a certain percentile (only top 25% of the class gets an A) then solve for the 75th percentile
