October 2011 Exam C4 Progress Thread

[actuary44]

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 line

29.16 - how did you get from
specifically the part, I'm probably just missing something obvious.

29.18 - the second line , I didn't understand how you got to

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.

Done with Lesson 48. We'll see if I get around to Lesson 49 today.

[SandbagQueen]

Originally Posted by am_vanquish

That last part sounds like something from an AA meeting.

Actuarialz Anonymous

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.

[dragoncub]

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.

[dragoncub]

I only do lesson 31 done today, got busy doing other things, didn't really like this lesson.

[Sindel]

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.

[actuplax]

Goal for today: lesson 17-18-19

Finished Lesson 49 problems this morning. I will do Lesson 50 tonight. I'm starting to see that yellow finish line!

[actuary44]

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.

[vagarach]

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...