The following are scores of ten students in their 40-item quiz. 34 23 15 27 36 21 20 13 33 25

1. What are the scores of the students which are less than or equal to 50%of the data?

2. What are the scores of the students which are less than or equal to 25% of the data? (What is the equivalent of 25% in quartile?

3. What are the scores of the students which are less than or equal to 80% of the data? What is the equivalent of 80% in decile?