Hi all,
I hit this practice question today:
A CFA practice question for Level 1 (12/2014) - Study Session 2. Reading 7. http://analystnotes.com/cfa/cfa_exam_prep.php?page=gX9Etrg5bT
I do not see how Analyst Notes got their answer
My answer gives me
(38 + 1) * 75/100
= 29.25
I believe that you’re misinterpreting the answers (yours and theirs).
Your calculation determines where the third quartile lies with respect to the ordinal data: 25% of the way from data point 29 to data point 30, whatever their values.
Their calculation determines where the third quartile lies with respect to the _ values of the data points _.