Mathematical Methods CAS Exam 1 Discussion - How was it??

[Water]

Don't think p can equal zero as they flipped two heads one tail.

no they didnt.. they asked you to calculate the probability in terms of p.

if p=0 then the pr of getting 3 heads is 0
and the probability of getting 2 heads and tail is also 0. thus it makes perfectly good sense.

Then how is it biased? If both sides equate to 0? o.O

pr = 0 , means, COINLESSNESS


One Tail = means absolute 1 sided coin ): , nvm I'll shutup lol >_>

[luken93]

Don't think p can equal zero as they flipped two heads one tail.

no they didnt.. they asked you to calculate the probability in terms of p.

if p=0 then the pr of getting 3 heads is 0
and the probability of getting 2 heads and tail is also 0. thus it makes perfectly good sense.

Then how is it biased? If both sides equate to 0? o.O

Biased just means there isn't an equal probability of rolling a head as there is a tails...it's weighted on one side

OMFG though, wish I would've realised that (7/2)^2/2 = 49/4...probably would've made things a little easier

[Water]

Don't think p can equal zero as they flipped two heads one tail.

no they didnt.. they asked you to calculate the probability in terms of p.

if p=0 then the pr of getting 3 heads is 0
and the probability of getting 2 heads and tail is also 0. thus it makes perfectly good sense.

Then how is it biased? If both sides equate to 0? o.O

Biased just means there isn't an equal probability of rolling a head as there is a tails...it's weighted on one side

OMFG though, wish I would've realised that (7/2)^2/2 = 49/4...probably would've made things a little easier

Hence because it isn't equal probability, p > 0


Anyways, Math Methods Exam 2, to mope over.

[Andiio]

Don't think p can equal zero as they flipped two heads one tail.

no they didnt.. they asked you to calculate the probability in terms of p.

if p=0 then the pr of getting 3 heads is 0
and the probability of getting 2 heads and tail is also 0. thus it makes perfectly good sense.

Agreed

[b^3]

Don't think p can equal zero as they flipped two heads one tail.

no they didnt.. they asked you to calculate the probability in terms of p.

if p=0 then the pr of getting 3 heads is 0
and the probability of getting 2 heads and tail is also 0. thus it makes perfectly good sense.

Then how is it biased? If both sides equate to 0? o.O

Biased just means there isn't an equal probability of rolling a head as there is a tails...it's weighted on one side

OMFG though, wish I would've realised that (7/2)^2/2 = 49/4...probably would've made things a little easier

I think you mean ((7/25)^2)/2=49/4.

[tazza]

If you think about it, how can a TWO sided coin only ever land on side? I did contemplate putting p=0 though, but it seemed too silly.

[nacho]

dont all probablities
have to lie between
1 and 0 ?

[t5am94]

for the probability question
if you started the equation by saying Integral from 3.5 - 2 blah blah blah
but throughout all your working out you stupidly worked out 3.5 - 0
would i get any marks

ovasly both my answers were wrong as for
a) i got 3/8
b) 1 ovasly wrong haha

would i get anymarks?

I got the same answers as you did. Im pretty sure consequential marks will be allocated

[acinod]

If you think about it, how can a TWO sided coin only ever land on side? I did contemplate putting p=0 though, but it seemed too silly.

It maths. Ever since we were young we realised that maths is imaginary. It contains weird things like counting elephants and men with 4 feet. A rigged coin that always lands on tails is nothing out of the ordinary in maths world

[skorm123]

Can anyone explain to me how consequential marks work?
Thanks

[BoredSatan]

dont all probablities
have to lie between
1 and 0 ?

no.. eg the probability of a FAIR 6 sided dice rolling a 7 is 0..

and not both sides are 0..
head is 0 and tail is 1.

as I said before.. a coin that is tail on both sides..

like 2 face from batman whose coin had heads on both sides..

[Furbob]

first half going good, second half - part of me died

too many arithmetic errors. omg.

*rocks back and forth over not being able to divide by 2 when doing that sin(2x+pi/3)=1/2, why did I multiply by 2 instead of divide?! WHYYYY*

[funkyducky]

Can anyone explain to me how consequential marks work?
Thanks

if you get part a of a question wrong, for example, and you need to use the answer in part b/c or something like that, and you work through part b/c correctly using the wrong value from part a, you can get consequential marks for parts b and c for doing the right thing.

[skorm123]

Would I get at least one mark for mentioning (-infinite,-8] intersection [-2,infinite) n.b it should be union not intersection and the question was worth 2 marks.

[funkyducky]

^ maybe, I can't say for sure. Depends on the marking scheme.