Probability Notation

[hyperblade01]

For binomial do we have to write for example:

X ~ Bi (6, 0.6)

or is it not necessary..
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For transitional matrices, how do we label the columns and rows?
Let's say it's one of those questions about rain and no rain

Is it alright to label it as R and N, saying what each mean on the side?
Or do we have to do the whole Pr(R|R') stuff...



Thanks in advance guys

[kdgamz]

For binomial do we have to write for example:

X ~ Bi (6, 0.6)

or is it not necessary..
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it depends, u wudnt normally hav to do that, but if X is not defined in the question and in your answer u randomly pull X
out of nowhere, the assessors might get confused...i normally do use that notation

in short..i dont think u hav to do that, simply labelling the parameters (n=... p=...) wud probably be enough

[TrueTears]

Nah you don't have to calc synatx, just simply state p = blah n = blah like kdgamz said.

[mankay]

Nah you don't have to calc synatx, just simply state p = blah n = blah like kdgamz said.

Would the following be fine?

X~Bi(n,p)|X=number of people, etc

[TrueTears]

Nah you don't have to calc synatx, just simply state p = blah n = blah like kdgamz said.

Would the following be fine?

X~Bi(n,p)|X=number of people, etc

I personally never use Calc syntax for probability, I just state the values of the variables and plug in calc. If the question was worth more than 1 mark, I write the formula out etc.

[kdgamz]

Nah you don't have to calc synatx, just simply state p = blah n = blah like kdgamz said.

Would the following be fine?

X~Bi(n,p)|X=number of people, etc

u dont hav to be too specific, but if thats how u want to do it then....

[mankay]

Nah you don't have to calc synatx, just simply state p = blah n = blah like kdgamz said.

Would the following be fine?

X~Bi(n,p)|X=number of people, etc

I personally never use Calc syntax for probability, I just state the values of the variables and plug in calc. If the question was worth more than 1 mark, I write the formula out etc.

I'm fairly certain none of what i wrote is calculator syntax (in other words, it's proper mathematical notation)

[TrueTears]

Nah you don't have to calc synatx, just simply state p = blah n = blah like kdgamz said.

Would the following be fine?

X~Bi(n,p)|X=number of people, etc

I personally never use Calc syntax for probability, I just state the values of the variables and plug in calc. If the question was worth more than 1 mark, I write the formula out etc.

I'm fairly certain none of what i wrote is calculator syntax (in other words, it's proper mathematical notation)

Mathematical notation is to just simply state p and n.

And then write out the binomial formula and plug in the respective values.

[moekamo]

Nah you don't have to calc synatx, just simply state p = blah n = blah like kdgamz said.

Would the following be fine?

X~Bi(n,p)|X=number of people, etc

I personally never use Calc syntax for probability, I just state the values of the variables and plug in calc. If the question was worth more than 1 mark, I write the formula out etc.

what formula can you use for normal and inverse normal, or do you shade the region of the curve or something?

[TrueTears]

Nah you don't have to calc synatx, just simply state p = blah n = blah like kdgamz said.

Would the following be fine?

X~Bi(n,p)|X=number of people, etc

I personally never use Calc syntax for probability, I just state the values of the variables and plug in calc. If the question was worth more than 1 mark, I write the formula out etc.

what formula can you use for normal and inverse normal, or do you shade the region of the curve or something?

You don't just simply state the value of the answer if it's 1 mark.

If more, then you state the probability ie, Pr(X>a) or whatever and then state the values of mean, and s.d.

[mankay]

Mathematical notation is to just simply state p and n.

That is not standard mathematical notation at all.

[TrueTears]

Mathematical notation is to just simply state p and n.

That is not standard mathematical notation at all.

Yes it is.

Tell me where you see Bi(n,p) that is not universal notation at all.


Stating the values of p and n is as simple as it gets and tells the examiner you clearly know what you are doing instead of some Bi(n,p) jibberish.

[arthurk]

what about in the case of binomcdf
what do we write when we want to for example n=10 p=0.3 and we want Pr(X>4)
what should we write down?

[TrueTears]

what about in the case of binomcdf
what do we write when we want to for example n=10 p=0.3 and we want Pr(X>4)
what should we write down?

Then plug into calc and write answer. (I'd think you can just plug into calc and write the answer straight away and just state you used your calculator.)

If it was Pr(X>4) and n = 200 then all you have to write is "Using TI-89 (whatever calculator you are using) binomialcdf" after you write your answer.

If it was Pr(X=4) then you'd write

[arthurk]

awwww
sounds like binomial probability is pretty gay with working