PERCENTILE OF grouped and ungrouped.pptx

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 70 th 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 70 th 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