1 in a set of students test scores the first quartile is 52

Question

1. In a set of students' test scores, the first quartile is 52. What percent of the students scored at or below 52?

2. On a set of scores from a standardized exam, the second quartile is 450. What is the median for the set of scores?

3. The third quartile for salaries at a company is $60,000. How many employees make more than $60,000?

4. Find the interquartile range for a data set for which Q₁ = 21 and Q₃ = 45.

5. Find the interquartile range for a data set for which Q₁ = 124.5 and Q₃ = 316.5.