# CFA Level I Mock Exam Afternoon Q17 and Q20

Q17 (A) Use of abbreviations Why is this choice wrong? I think it’s OK to use CFA for Charted Financial Analyst. Q20 solution is (B) The 10 numbers are: -11, -5, 8, 9, 18, 20, 20, 21, 25, 35 Shouldn’t we use the following to calculate the position of an observation in a given percentile: (1+N)*(percentile) = (1+10)*80% = 8.8 so the number is somewhere between the 8th and 9th number which is 21 + 0.8*(25-21) = 21 + 3.2 = 24.5 that is © Can someone please help me with these two problems?

Regarding your question with percentile. According to schweser - When they ask for the population of a given percentile, you use the (1+N) * (X/100) When they ask for sample, you use (N) * (X/100) Hope this helps…

I have the same confusion about Q17, why blogging bout broad topic of CFA program is prohibited?

I’m not sure what the questions is, but if it is about blogging about broad topics on the exam, look at page 140 under the confidential program info… second paragraph (just under the 2 points). Now, do I know why this is a violation… not really.