VCE Methods Question Thread!

[Private Joke]

Can anyone help me out with vcaa 2012 exam 2 q3d? I really don't get it

[sallos]

It's just using the equation,  Z= (x-m)/SD
..so, find the z values for each probability by using the "inv norm" function on the CAS and then substitute them into two of the above equations to find 'm' and "SD".

Hopefully this helps

[cookiedream]

Would someone be able to explain what the question means when it says X'P' ?

It means the distance between the newly transformed points of X (now X') and P (now P')

[esthertham58]

Can someone please explain this question for me? I have trouble understanding it.

[Private Joke]

It's just using the equation,  Z= (x-m)/SD
..so, find the z values for each probability by using the "inv norm" function on the CAS and then substitute them into two of the above equations to find 'm' and "SD".

Hopefully this helps

Thank you it does help

[HasibA]

yo my dudes
what does 1 x E4 mean? is it 1 x 10^4, where E is basically 10?
help a noob out ehhe ty

[JellyBeanz]

yo my dudes
what does 1 x E4 mean? is it 1 x 10^4, where E is basically 10?
help a noob out ehhe ty

Yup that's precisely what it means.

[jazzaa36]

At times it comes up with questions where we have to find the mean and standard deviation to find the probability ( not using normal) BUT how do we know if we use E(P^) = p or E(x)= np I've seen both being used even in the same context 

[HasibA]

Yup that's precisely what it means.

sweet, came through nicely jellybeanz! how was methods?
was not even aiming for a 25 (course didnt need it) but i think i got 25+/40 which surprised me hella hahaha (did 1 school trial exam and only studied last night)
t'was nice

anyways another q-> i know they ask for exact values in answers, but lets say you get an answer thats like 1/2, and your write 0.5, thats allg?
even for co-ordinates, like you get (1/2,0) , is there any preference?
bc i oscillate between 0.5 and the fraction in almost every answer consecutively, would i be penalised? LOL ty AN

[JellyBeanz]

sweet, came through nicely jellybeanz! how was methods?
was not even aiming for a 25 (course didnt need it) but i think i got 25+/40 which surprised me hella hahaha (did 1 school trial exam and only studied last night)
t'was nice

anyways another q-> i know they ask for exact values in answers, but lets say you get an answer thats like 1/2, and your write 0.5, thats allg?
even for co-ordinates, like you get (1/2,0) , is there any preference?
bc i oscillate between 0.5 and the fraction in almost every answer consecutively, would i be penalised? LOL ty AN

Didn't find it too bad XD

And nice job Hasib!, never feel like you won't make it

I think they would prefer it in fractional form if asked to give the exact value, that's been the general consensus as far as i'm concerned, even though i don't think there is a problem with writing 0.5, just better to be on safe side

[HasibA]

Didn't find it too bad XD

And nice job Hasib!, never feel like you won't make it

I think they would prefer it in fractional form if asked to give the exact value, that's been the general consensus as far as i'm concerned, even though i don't think there is a problem with writing 0.5, just better to be on safe side

awesome, haha i walk in not expecting much for any of my exams and they all have surprised me thus far, alas, only aiming to get into my course hehe

and sweet- ill try be consistent tmr xD cant wait till its done, and then theres only chem left!
gl with exam 2 tmr guys

[clockerrs11]

What does a normal approximation mean?
I know how to NOT do a normal approximation, but what does it mean to actually use a normal approximation instead?

[Nicko912]

Would anyone happen to know how to do this with the casio classpad, a domain like [0,1) U (1,inf) to sketch with? What would you write? Or is is this unnecessary?

[foelth411]

What are VCAA going to take for rounding for probability?
Cause if you look at this question from MAV they have rounded to the nearest whole number, but it doesn't make sense for the question.

Thanks in advance

[sayy11]

Could someone please explain how you get the answer D?