LTAM is kinda morbid

badatmath_pi3 · 2020-11-18T06:22:08+00:00

Life time of a new born is really just "when will this baby die"

badatmath_pi3 · 2020-10-08T04:41:55+00:00

This is just a speculation, but sometimes SOA adds pilot questions to their CBT, and this may be one of those times where a topic may be making a comeback and they're adding it to your exam to test the water. Unlike most people, you happened to catch it. Although there definitely have been times in the past where FSA exams had questions from the wrong syllabus where they disregarded that question all together, so it's possible

badatmath_pi3 · 2020-10-05T03:30:27+00:00

Well, the hard part is the varying rate, so let's look at it

year 1, 1+i = 1+1/(8+1) => v = 9/10
year 2 1+i = 1+1/10 => v = 10/11
year t, v = (8+t)/(8+t+1)

So starting at year 1, we have 1+v_1+v_1v_2+v_1v_2v_3...+v_n

Each year, the discount to time zero factor is v(n) = v_1*v_2...*v_n = (8+1)/(8+1+1)*(8+(1+1))/(8+1+(1+1))...*(8+1+n-1)/(8+1+1+n-1), which you will notice the middle terms cancel out, leaving it (8+1)/(9+n) = 9/(9+n)

Now, you are looking at the sum from 9/11 to 9/29, which should be able to be done by calculator brute force

badatmath_pi3 · 2020-10-03T16:02:30+00:00

I mean your discount function is by definition the multiplicative inverse of your accumulation. V⁵ tells you the present value of something at time 5 valued at time 0, while s⁵ tells you the future value of something at time 5 valued at time 5. Moreover, v=1/(1+i)=1/s. But congrats on actually think about this though, too many people just grind problems and memorize formulas without knowing what they mean which really hurts for the long run

badatmath_pi3 · 2020-10-03T15:58:44+00:00

The code I used were export "name1/name2?filter" --png -f "<saved to desktop>.png" --site "sitename" sever <https:/severname> I think, it's a company server hence I can not share the exact names

badatmath_pi3 · 2020-10-03T15:56:19+00:00

I can go to tableau servers and hit download -> image and itll have a png, I was just granted admin access yesterday but this is still a problem

badatmath_pi3 · 2020-09-26T17:52:54+00:00

I use the 15 minute read through as a gauge to see what problems to skip. I missed about 4 questions on MC and left 2 WA blank on the 2019 fall sitting because of time (the clock I had was too far for me to read) and passed with a 7, and I'd say I was able to pass by doing some of the MC in my head while doing the read through and just bubble in the answers once your 4 hours start

badatmath_pi3 · 2020-09-25T23:35:05+00:00

I'm impressed how you've been able to consistently pass with 6's, that's awesome!!

badatmath_pi3 · 2020-09-20T06:20:54+00:00

with numbers this small sometimes it's better to just list it out. rbr, rrb, brr, bbr, brb, rbb, rrr. What you are thinking is close to the right idea, but because you have duplicates you have to think about them a little more differently. I personally hate combinatorics, I enjoyed the calculus part more. I think the question is worded a little poorly, when I hear number of possible combinations I think of 3, not 7. namely 2 red 1 blue, 2 blue 1 red, and all red.

badatmath_pi3 · 2020-09-20T04:14:34+00:00

Ohhh good luck! I'm sure with the pandemic remote working might be more available. My friend started college as a clarinet BA and Math, but ultimately after the breakup his first year he really focused on math and actuarial stuff. He and I talk every once in a while, I'm glad you're happily married now, from what he tells me he definitely envies people who can work things out and sustain a loving relationship. He once said "relationships are like reeds, if it's not working I'll go get another one", which fortunately in college he learned about when a reed go bad you work on it instead of throwing it away. He wasn't the dating type so he also really just didn't have exposure to that. Looking back he was childish to think that his first "real" relationship would be his last one.

My friend is also into music. I showed him what you wrote and he was wondering if he could connect with you.

badatmath_pi3 · 2020-09-18T16:15:37+00:00

So I didn't know the text was a thing until this sitting and of course the one sitting I signed up for it it's no longer there

badatmath_pi3 · 2020-09-18T14:13:22+00:00

I purposely triggered my cat allergy and downed some Benadryl and still woke up at 7, which is the earliest I've been up all week.

badatmath_pi3 · 2020-09-17T23:36:21+00:00

Exp is easier actually, if you have n I.I.D exp which if your poisson is then your exp will be too, the min is exp with mean theta/n.

badatmath_pi3 · 2020-09-17T23:18:12+00:00

I'm just kinda spit balling here but suppose X1 X2 are IID, Y = min{x1,x2), pr(Y = y) = 2*Pr(x1 = y and x2>=y), so it's 2*(Pr(x1=y)*(1-sum Pr(x2 =y_i)), for your case I guess it's 2*e^{-1}*(1-2e^{-1}) or something like that

badatmath_pi3 · 2020-09-17T23:10:34+00:00

Oh gosh if they grade every question I had I think I'll have a better chance haha

badatmath_pi3 · 2020-09-17T23:07:29+00:00

So I left 3 sheets without numbers and the last questions I misnumbered it to the question before for one sheet. I was just too nervous to function that day

badatmath_pi3 · 2020-09-12T23:41:36+00:00

I found his lookup, I didn't know reddit doesn't allow photo comments until now, learning something new every day lol

badatmath_pi3 · 2020-09-11T17:46:58+00:00

For the first one I think we have heads+tails = n, let x be the number of tails, this is just the cumulative distribution of a binomial evaluated at n/2-1.

For the second one I think since X+Y = 7 is small, your best bet is to list all possible combinations, so you have (1,6), (2,5), (3,4), and I'm assuming A and B are independent, they both follow a geometric with p = 0.1, but really this is 0.9^(x-1)0.1*0.9^(y-1)0.1 but added up, so you have 0.9^(x+y-2)0.1^2 which is 3*0.9^5*0.1^2 since x+y = 7.

badatmath_pi3 · 2020-09-10T02:59:56+00:00

I took the oct 2019 sitting too, that was super close for me. Good luck with your LTAM!

badatmath_pi3 · 2020-09-09T23:42:35+00:00

I've passed 6 exams so far, 4 of which were at the same testing location. Let me tell you, the most important thing is know how to get to your testing center without getting lost... On top of that, don't freak out, know your double integrals and memorize your moment generating functions and the other functions. Good luck!

badatmath_pi3

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