Answer:
Seventy-five percent of the data values lies between 20 and 50; and the interquartile range is 25.
Step-by-step explanation:
The three quartiles of a data set represent 75% of the data. The lowest value is 20 and the third quartile is 50; this means that 75% of the data is between 20 and 50.
The first quartile is 25 and the third quartile is 50; this makes the interquartile range 50-25 = 25.
