SOLUTION: Twenty students took a 20-item exam. Ten students scored 12,five students scored 15, three scored 18, and everyone else scored 20. Identify the score at each of these positions 1.

Question 1194114: Twenty students took a 20-item exam. Ten students scored 12,five students scored 15, three scored 18, and everyone else scored 20. Identify the score at each of these positions
1. 80th percentile
2. 6th decile
3. Median
4. 3rd quartile
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
12/12/12/12/12/12/12/12/12/12/15/15/15/15/15/18/18/18/20/20
Median is between the 10th and the 11th or score of 13.5 (average of 12 and 15)
60 %ile is the 12th or score of 15
3rd quartile is the midpoint of the upper half or score of 16.5
80 %ile is the 16th or score of 18
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