A Researcher Decides to Split Scores on an Exam into Quartiles.She

Multiple Choice

A researcher decides to split scores on an exam into quartiles.She determines that a score of 64 is at the 25th percentile,a score of 74 is at the 50th percentile,and a score of 80 is at the 75th percentile.What is the interquartile range (IQR) for these data?

A) 16
B) 10
C) 6
D) There is not enough information to answer this question.