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CT3 questions that are out of scope of CS1 (2013-2018)

John Lee

ActEd Tutor
Staff member
Questions on PGFs are out of scope:
S18 Q2

Questions on compound distributions are out of scope:
A13 Q10, S13 Q8iv-, A14 Q7ii-, S14 Q3, A15 Q3, A16 Q9iv,10vii, S16 Q9ii, S17 Q7

Questions on ANOVA are out of scope:
A13 Q8i,iib, S13 Q9v, A14 Q9, S14 Q9, A15 Q10, S15 Q6, A16 Q8, S16 Q10, A17 Q6i , S17 Q9iii- , A18 Q8 , S18 Q9iv-
 
Thank you! This saved me a lot of time to help me complete all the 2005~2022 exam questions.
 
Alas, I've only gone back to 2013 as it took ages - but hopefully the topic areas which are now off syllabus should make it quicker to identify the questions.
 
Questions on PGFs are out of scope:
S18 Q2

Questions on compound distributions are out of scope:
A13 Q10, S13 Q8iv-, A14 Q7ii-, S14 Q3, A15 Q3, A16 Q9iv,10vii, S16 Q9ii, S17 Q7

Questions on ANOVA are out of scope:
A13 Q8i,iib, S13 Q9v, A14 Q9, S14 Q9, A15 Q10, S15 Q6, A16 Q8, S16 Q10, A17 Q6i , S17 Q9iii- , A18 Q8 , S18 Q9iv-
Hi John,
please could you confirm if sept 2012 q 4 is out of scope?

Thanks
 
Hi John,

sorry me again, could you double check question 8iv in sept 2018 please? i got caught out on the standard deviation formula, and havent seen this in the course notes
 
Hi John,

sorry me again, could you double check question 8iv in sept 2018 please? i got caught out on the standard deviation formula, and havent seen this in the course notes

also april 2017 question 8 part vii c please?
 
S2018 8iv and A2017 8vii c, standard deviation is assumed knowledge, it is the square root of the variance

Thank you Andrea, I understand that sd=\sqrt var, i just am having trouble with the logic of how they are obtaining the variance of the multiplied distribtuions

For example
S2017 8vii c
S- total amount on all policies
mean claim amount =100
var of claim amount =20^2

Y- number of claims
E(Y)=195
Var(Y)=308.25

so
E(S)=E(claim amount*Y)=E(meanclaim amount)*E(Y) since indepedent
=100*195 << i undertsand this part

its this part i cant seem to get to an answer for . in my head, we are looking for: Var(S)=Var(claim amount*Y)

the solutions seem to jump to
Var(S)=E(Y)var(mean claim amount)+E(mean claim amount)*var(Y) <<this equation for the variance is the part i dont understand

but where has this equation come from? it seems that this formula for variance is used again in the other question i rasied: S2018 8iv

would really appreciate any help on this.
thanks so much
molly
 
sorry misunderstood your question, sorry, S2018 8iv and A2017 8vii c are compound distributions, they are out of scope, the formula is on p16 of the Tables, you will use this in CS2.
I will ask John to add these to the list!
 
sorry misunderstood your question, sorry, S2018 8iv and A2017 8vii c are compound distributions, they are out of scope, the formula is on p16 of the Tables, you will use this in CS2.
I will ask John to add these to the list!

ah, that's a relief that they are out of scope, thank you!
 
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