this is a research stat PPT

1. PERCENTILE OF
UNGROUPED DATA

2. PERCENTILES is a 99 score
points which divides the
distribution into 100 equal
parts

3. K- is a number from 1-99
n- is the number of scores or values

4. Find the 70th percentile, given the scores of 9
students in their mathematics performance task.
16,7,31,7,30,31,3,4,21
Step 1: 3,4,7,7,16,21,30,31,31
Step 2: Calculate the location of
P70 in the distribution

5. th
th

6. 3,4,7,7,16,21,30,31,31

7. th
th

8. Interpretation:
Therefore the 70th percentile in given the
scores of 9 students in their mathematics
performance task is 30

9. PERCENTILE RANK
Proportions of scores in a distribution
that a specific score/s is greater than or
equal to.

10. Example:
A teacher gave a 20-item test quiz to
10 students. The scores are as follows:
12,14,10,19,12,11,9,18,9,20. Find the
percentile rank of 14