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#31
11-01-2003, 11:08 PM
 modelthry Member CAS Join Date: Apr 2002 Location: Cabrini Green Studying for Done, whoo hoo! Posts: 997

Quote:
 Originally Posted by BassFreq What am I saying???? No, #40 is not a defective question. Since 1 was not a choice, ya'll should've known to use the pk=pq^(x-1) version of the distribution!
Except that this version has no Beta in the definition. The one in the tables does, so the presence of Beta in the problem strongly suggests they're referring to the table version.
#32
11-02-2003, 01:02 AM
 BassFreq Member CAS Join Date: Jun 2003 Location: Chicago Studying for all eternity Favorite beer: Duff Posts: 1,708 Blog Entries: 2

I really want it to count so that fewer people pass and those of us that do become more valuable. To be fair, had I gotton it wrong, I would be on your side completely.

I suspect what happened was: The author, having looked over the material in Simulation, submitted the question with p=.3. The committee (or someone on it) changed it to the "equivalent" B=7/3, not knowing that one distribution starts at k=0 while the other starts at k=1.

Another way to look at it all is to say that, since B was given, the correct solution would be given by:

INT[ Ln( 1 - 12/25) / LN( 1/(1+1/B) )] + 1
#33
11-02-2003, 02:13 AM
 Expunge Member Join Date: Jul 2003 Posts: 9,181

40 absolutely should be considered defective. The tables that they provided us yeilded an answer of 1 which was not an option.
#34
11-03-2003, 07:30 AM
 DukeCrow Member CAS AAA Join Date: Jan 2003 Posts: 77

If you use 1-u instead of u, W<sub>3</sub> = 2. It's too bad they didn't specify on the question that small u's corresponded to high number of losses.

Very poorly worded question.
#35
11-03-2003, 12:17 PM
 Expunge Member Join Date: Jul 2003 Posts: 9,181

when will the cas post the exam and solutions on the casact site?
#36
11-03-2003, 02:13 PM
 bigsmoyl Join Date: Nov 2003 Posts: 3

RE: question 39

Maybe some one can help me out here... How is it rational for to set up your accept/reject in an order other than 1-5 or 5-1? I had assumed that you were asked the following questions: which is more efficient, u=F(x) or u=S(x)? Is there some reason why this logic is incorrect? If it is correct, wouldn't the correct answer be B?
#37
11-03-2003, 02:54 PM
 Levin Member CAS Join Date: Jan 2003 Location: AO ID Retirement Home Posts: 8,001

Quote:
 Originally Posted by DukeCrow If you use 1-u instead of u, W3 = 2. It's too bad they didn't specify on the question that small u's corresponded to high number of losses. Very poorly worded question.
In fact, that's how I ended up with 2 ... after first getting 1.
#38
11-04-2003, 08:59 PM
 ramanujan Member CAS Join Date: Oct 2003 Posts: 501

Quote:
 Originally Posted by ramanujan I would guess the pass marks to be >25 (27?). Any thoughts, anyone?
Spoke too soon. I am not passing with a pass score of 27.
#39
11-04-2003, 11:03 PM
 Maver-Act Member Join Date: Nov 2003 Posts: 56

How official is the preliminary answer key? Have they changed it before after publishing it?
#40
11-05-2003, 10:32 AM
 Expunge Member Join Date: Jul 2003 Posts: 9,181

its been updated as of 11/5

#3 is now B
#25 is now B

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