Actuarial Outpost October 2011 Exam C4 Progress Thread
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#571
07-30-2011, 03:02 PM
 actuary44 Member CAS Join Date: Nov 2008 Location: Orange County, CA Studying for Time Series Posts: 899

Quote:
 Originally Posted by dragoncub I don't know if you need to expand the explanations, its just that I'm probably not as bright as the average actuarial exam taker. But just in case, the problems that I remember I could get were, 29.08 - how did you get to the $-4\theta^2$ line 29.16 - how did you get from $3ln(1-\frac{10}{k}) - 2lnk = 3ln(k-10) - 5lnk$ specifically the $5lnk$part, I'm probably just missing something obvious. 29.18 - the second line $\frac{dl}{d\mu}$, I didn't understand how you got to $5-\mu\Sigma\frac{1}{x_{i}}$
29.08 - Just multiply the whole thing by the common denominator, which is the product of all three denominators.

29.16 - if you add 3ln k to the first term and subtract 3ln k from the second term, you'll get it. 3ln k + 3ln (1 - 10/k)= 3ln (k - 10). You'd have to remember that ln A + ln B = ln (A*B)

29.18 - since there is an x_i in both numerator and denominator, you factor it out and get 1 inside the summation, but since there are 5 observations, you're adding up 5 of these, so that's how you get 5 - the summation.

I agree 29.16 would probably be the hardest one to see. I've also had problems with following the steps when Abe skips them, but off the top of my head I can't remember which ones. From now on, I'll start marking them if I come across any as well.
__________________
ACAS: 5, 6 | FCAS: 7, 8, 9
VEEs: Finance, Statistics, Economics (Micro, Macro) | Online Courses: 1, 2
Prelims: 1/P, 2/FM, 3F/MFE, MLC, 4/C
#572
07-30-2011, 03:33 PM
 Justin.M Guest Posts: n/a

Done with Lesson 48. We'll see if I get around to Lesson 49 today.
#573
07-30-2011, 07:37 PM
 SandbagQueen Member SOA Join Date: Dec 2006 Location: TN Studying for FAP and/or EA Favorite beer: Blue Moon Posts: 1,577

Quote:
 Originally Posted by am_vanquish That last part sounds like something from an AA meeting.
Actuarialz Anonymous

Quote:
 Originally Posted by am_vanquish My best motivation for this exam is the thought of being DONE with the prelims by the time the holidays arrive. Seems like that would make for a really nice holiday season this year.
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"Exam C/4 is the catch-all exam containing all mathematical material that doesn't fit easily into one of the other exams." -Abraham Weishaus, ASM manual

P FM MFE MLC C VEE (all 3)
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#574
07-30-2011, 09:58 PM
 dragoncub Member CAS Join Date: Feb 2010 Location: New York Studying for 5 Posts: 545

Quote:
 Originally Posted by actuary44 29.08 - Just multiply the whole thing by the common denominator, which is the product of all three denominators. 29.16 - if you add 3ln k to the first term and subtract 3ln k from the second term, you'll get it. 3ln k + 3ln (1 - 10/k)= 3ln (k - 10). You'd have to remember that ln A + ln B = ln (A*B) 29.18 - since there is an x_i in both numerator and denominator, you factor it out and get 1 inside the summation, but since there are 5 observations, you're adding up 5 of these, so that's how you get 5 - the summation. I agree 29.16 would probably be the hardest one to see. I've also had problems with following the steps when Abe skips them, but off the top of my head I can't remember which ones. From now on, I'll start marking them if I come across any as well.
Thanks for the explanations. For #8 that's what I was doing, I think I probably messed up on the multiplication somewhere.
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#575
07-30-2011, 10:00 PM
 dragoncub Member CAS Join Date: Feb 2010 Location: New York Studying for 5 Posts: 545

I only do lesson 31 done today, got busy doing other things, didn't really like this lesson.
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1/P - 2/FM - 3F/MFE - 3L - 4/C - 5 - 6 - 7 - 8 - 9
OC1 - OC2
#576
07-31-2011, 04:01 AM
 Sindel Member Join Date: Jun 2011 Location: Canberra Posts: 867

Got through Lessons 16 and 17 today. It's only 6pm but I'm not sure if I want to do 18 as well and finish up this section, since I feel kind of burned out already.

It's kind of exciting and kind of scary to get through this long relatively unimportant first section. The next one consists of the 8 most important lessons in the manual according to exam weight. Hope they're not awful.
#577
07-31-2011, 10:38 AM
 actuplax Member SOA Join Date: Jun 2010 Location: Montreal Studying for AdvF College: UQAM Posts: 150

Goal for today: lesson 17-18-19
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VEE: Applied Stats Corporate Finance Economics
FAP: Mod 1-5 IA Mod 6-8 FA
ERM module
#578
07-31-2011, 02:53 PM
 Justin.M Guest Posts: n/a

Finished Lesson 49 problems this morning. I will do Lesson 50 tonight. I'm starting to see that yellow finish line!
#579
07-31-2011, 03:34 PM
 actuary44 Member CAS Join Date: Nov 2008 Location: Orange County, CA Studying for Time Series Posts: 899

Quote:
 Originally Posted by Justin.M Finished Lesson 49 problems this morning. I will do Lesson 50 tonight. I'm starting to see that yellow finish line!

I'm just chugging along on Lesson 43.
__________________
ACAS: 5, 6 | FCAS: 7, 8, 9
VEEs: Finance, Statistics, Economics (Micro, Macro) | Online Courses: 1, 2
Prelims: 1/P, 2/FM, 3F/MFE, MLC, 4/C
#580
07-31-2011, 05:50 PM
 vagarach Member Join Date: Oct 2006 Location: Canada Studying for C Posts: 314

Halfway through the problems for Lesson 22 (variance of KM and NA estimators)! I'm going through all this stuff with a sense of dread for the credibility section...

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