Interquartile Range

What is the correct order for finding the Semi-interquartile Range (SIQR)?

Quartiles are values that divide a data set into four equal parts.

if the ages of women in a book club are 34, 43, 45, 32, 38, 30, 44... what is the median?

What is the formula for finding the Interquartile Range (IQR)?

Jenny scored at the 99th percentile on a test.

How should this information be interpreted?

Using the table, calculate the percentile rank of the score 65

What would be the correct approach in finding the Semi-interquartile Range?

12, 13, 14, 15, 15, 18, 20

The following statistics on the family income  in pesos are given below:

P25=4,500

P50=7,500

P75=10,800

P80=12,700

What percent of the families earn less than or equal to 4,500 pesos?