# CFAI mock PM, help :D

hi, _____________________________ in order not to violate the usage terms of the mock, i cannot post the question here, please look it up in your own copy. in this way i can be reasonably assured not to let non-registered guys access the mock. sorry for the inconvenience. _____________________________ hope there are already some of you out there that have taken the PM part of the mock … i have by mistake started with PM session but i doubt this is such a big deal. i scored 77.5% but finished well before the time limit… its below my average, so i’m quiete unhappy with it, but this is mostly because i miserably failed at ethics… (50%) and in retrospect can’t exactly tell why i did so poorly; the questions didn’t seem that hard in review. anyway, i have some issues with 3 of the questions and i hope that you can help me out here. —Q21 (quant)— this is a “closest to” question. i agree with the correct answer given, but i disagree with their conclusion on why their answer is correct (i.e. i got a different “closest-to” value) mean=355 upper_bound=mean+STDEV*scalingFactor <==> solve for STDEV for significance of 1% is disagree that the scalingFactor is ~3, but 2.57583. it would be 3.29053 for a significance of 0.1%. — Q64 (FSA)— this is a “closest-to” question. again, i got the correct answer, but my solution (“closest-to” value) differs. they calculate DPO the following way. DPO=365/(COGS/AP). but actually you calculate your AP-turnover with “purchases” in the nominator. we have all the information given, inventory(t)=inventory(t-1)+purchases(t)-COGS(t) <==> solve for purchases(t) the difference is not that stunning: COGS=1969 purchases=1932 DPO is different in my case. DSO and DIO are unchanged. — Q93 (Derivatives)— that must be a mistake… they say B, but it’s wrong. afterwards they explain why A must be correct. just read here that apparently in the AM exam there’s another “feature” like this… i hope they do a more thourogh review on the final exam. cheers