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Search: Posts Made By: Vincent Button
Forum: Long-Term Actuarial Math 08-06-2008, 10:55 PM
Replies: 1
Views: 2,778
Posted By Vincent Button
Beta Distribution and de Moivre's Law

There's a section in ASM headed: "Beta distribution, or Generalized de Moivre's Law". According to ASM:

\mu_x = \frac{\alpha}{\omega - x}

So I used this to calculate s(x), then...
Forum: Long-Term Actuarial Math 08-06-2008, 03:25 PM
Replies: 295
Views: 26,969
Posted By Vincent Button
Zzzzzz

Zzzzzz
Forum: Long-Term Actuarial Math 08-04-2008, 06:50 PM
Replies: 10
Views: 1,743
Posted By Vincent Button
Is _{\mu_x} the rate of mortality at age x of...

Is _{\mu_x} the rate of mortality at age x of someone just born, i.e. _{\mu_0{(x)}}; or the rate of mortality at age x of someone who has survived to age x, i.e. _{\mu_x{(0)}}; or are they...
Forum: Long-Term Actuarial Math 07-29-2008, 06:40 PM
Replies: 5
Views: 783
Posted By Vincent Button
It's probably worth pointing out that the...

It's probably worth pointing out that the previous question 2.10 used the same data, but asked for the normal approximation using the _mixed_ distribution. 2.11 is being given as a comparison.

I...
Forum: Long-Term Actuarial Math 07-26-2008, 02:31 AM
Replies: 12
Views: 1,271
Posted By Vincent Button
That's much clearer. Working aggregate values...

That's much clearer. Working aggregate values I've got the same answer as the manual. Thanks. Now I can sleep easily!
Forum: Long-Term Actuarial Math 07-26-2008, 01:43 AM
Replies: 12
Views: 1,271
Posted By Vincent Button
Obviously the first thing I solved was the mean...

Obviously the first thing I solved was the mean of the losses in class B which works out to be 30. After this it all went haywire for me!
Forum: Long-Term Actuarial Math 07-26-2008, 01:37 AM
Replies: 12
Views: 1,271
Posted By Vincent Button
Am I "allowed" to put the question in...

Am I "allowed" to put the question in word-for-word? Here we go:

You are given a portfolio of 100 risks in 2 classes, A and B, each having 50 risks. The losses of the risks in class A have a...
Forum: Long-Term Actuarial Math 07-26-2008, 01:36 AM
Replies: 12
Views: 1,271
Posted By Vincent Button
Am I allowed to quote myself? :argue: If...

Am I allowed to quote myself? :argue:

If this problem had been a mixed distribution then:

F[Y] = \frac{F[ A ]}{2} + \frac{F[ B ]}{2}

and

E[Y^2]=\frac{E[A^2]}{2}+\frac{E[B^2]}{2}
Forum: Long-Term Actuarial Math 07-26-2008, 01:01 AM
Replies: 12
Views: 1,271
Posted By Vincent Button
No, I don't! That's the problem. If ...

No, I don't! That's the problem.

If

Y = \frac{A+B}{2}

Then

Y^2 = \frac{A^2 + 2AB + B^2}{4}
Forum: Long-Term Actuarial Math 07-25-2008, 05:44 PM
Replies: 12
Views: 1,271
Posted By Vincent Button
ASM problem 2.9

This problem asks to find the variance of class B risks in a portfolio containing both class A and class B risks. (it actually uses s.d.s but using variance is simpler to explain). After a bit of...
Forum: Financial Mathematics 07-21-2008, 12:22 PM
Replies: 52
Views: 6,868
Posted By Vincent Button
I expected a 42, but got a 9.

I expected a 42, but got a 9.
Forum: Financial Mathematics 07-18-2008, 04:43 PM
Replies: 6
Views: 896
Posted By Vincent Button
Wow! Mine's covered in pencil marks and yellow...

Wow! Mine's covered in pencil marks and yellow highlighter. Am I the only one who desecrates their manuals?
Forum: Financial Mathematics 07-18-2008, 02:57 PM
Replies: 10
Views: 2,158
Posted By Vincent Button
I picked 30+ so it's a good job I passed this...

I picked 30+ so it's a good job I passed this test. I'll be interesting to see Monday how accurate we were!
Forum: Financial Mathematics 07-18-2008, 12:55 PM
Replies: 69
Views: 8,792
Posted By Vincent Button
Not only did I pass, but on the first attempt! ...

Not only did I pass, but on the first attempt! Very happy. Will take the family to Purple Cow tonight because I want a Chocolate & Kahlua milkshake. :toast: Then back to studying for MLC.
Forum: Long-Term Actuarial Math 07-10-2008, 10:56 AM
Replies: 295
Views: 26,969
Posted By Vincent Button
While waiting for my manual I've been going...

While waiting for my manual I've been going through my notes from 1/P to come back up to speed on the Stats and Probability stuff.
Forum: Long-Term Actuarial Math 06-23-2008, 08:38 PM
Replies: 1
Views: 771
Posted By Vincent Button
That's not a good sign! What did you use...

That's not a good sign! What did you use instead? Aren't the first 2 chapters just probability review?
Forum: Financial Mathematics 06-12-2008, 06:41 PM
Replies: 33
Views: 7,463
Posted By Vincent Button
Hmm - tough one! What about "Simple Interest"? ...

Hmm - tough one! What about "Simple Interest"?

\Large{a}\large[t] = 1+it

FOI
\Large\delta_t\large = \frac{i}{1+it}

Effective rate
\Large{i}\large_t = \frac{i}{1+i(t-1)}
Forum: Financial Mathematics 06-12-2008, 12:18 PM
Replies: 72
Views: 249,924
Posted By Vincent Button
Are your running firefox? Mine doesn't recognize...

Are your running firefox? Mine doesn't recognize excel files and opens up garbage. Save the attachment to disk then open with excel.
Forum: Financial Mathematics 06-07-2008, 07:15 PM
Replies: 7
Views: 1,769
Posted By Vincent Button
Wow! I didn't expect a 4:1 ratio in favor of...

Wow! I didn't expect a 4:1 ratio in favor of 3F/MFE.
Forum: Financial Mathematics 06-06-2008, 10:40 AM
Replies: 61
Views: 10,292
Posted By Vincent Button
On the CBT, I had the 32 page booklet. I always...

On the CBT, I had the 32 page booklet. I always check they give me the right number of pages. It was from reading this forum that I knew to expect that booklet. So far they have never given me the...
Forum: Financial Mathematics 06-06-2008, 10:31 AM
Replies: 7
Views: 1,769
Posted By Vincent Button
For those that took the May 2008 2/FM, which exam will you do next?

I'm going to chose MLC, otherwise my 1/P knowledge from that earlier exam will get rusty.
Forum: Financial Mathematics 06-05-2008, 01:07 PM
Replies: 490
Views: 53,298
Posted By Vincent Button
Why didn't they just say: a 3 year loan followed...

Why didn't they just say: a 3 year loan followed by a 2 year loan? I think below is probably what I attempted in the end, but the question was worded horribly.

(1+s_5)^5 = (1+s_3)^3(1+f)^2
Forum: Financial Mathematics 06-05-2008, 11:46 AM
Replies: 25
Views: 2,975
Posted By Vincent Button
Solve using X = \Large{a}\large_{n\rceil} ...

Solve using
X = \Large{a}\large_{n\rceil}
thus
Xi = 1 - v^n
and
Y = \Large{a}\large_{\small{2}\large{n}\rceil} = {(1+v^n)\Large{a}\large_{n\rceil}} = (1+ v^n)X
Forum: Financial Mathematics 06-05-2008, 11:13 AM
Replies: 490
Views: 53,298
Posted By Vincent Button
Here's another question that stumped me for a...

Here's another question that stumped me for a while.
It said you wanted a 5 year loan and there were two ways of structuring it. The interest rate was given.

Either
1, payoff a lump sum at the...
Forum: Financial Mathematics 06-04-2008, 11:47 PM
Replies: 15
Views: 2,598
Posted By Vincent Button
Are we sure the questions are randomly selected? ...

Are we sure the questions are randomly selected? Did anyone else get the same first question as me:
Which of these options are like a zero-coupon bond? The answer being Long Stock + Short Forward
Showing results 1 to 25 of 84

 

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