VCE Methods Question Thread!

[VanillaRice]

Hey,
Can someone please help me with this question?  I have no idea how to graph this on the CAS. All help is appreciated!!
Thanks in advance. 

Hi! Is that the Cambridge Essentials textbook? If so, page 704-705 gives a detailed method on how to perform repeated sampling on both the TI-Nspire and Classpad. For this question, you are looking at the distribution of 1500 samples of size 150, with a probability of 0.15.

[Sirius]

Hi! Is that the Cambridge Essentials textbook? If so, page 704-705 gives a detailed method on how to perform repeated sampling on both the TI-Nspire and Classpad. For this question, you are looking at the distribution of 1500 samples of size 150, with a probability of 0.15.

Hey Vanilla Rice,
It's from the Jacaranda textbook. Unfortunately I do not have the cambridge textbook, is it possible that you could explain it to me?
Thanks

[VanillaRice]

Hey Vanilla Rice,
It's from the Jacaranda textbook. Unfortunately I do not have the cambridge textbook, is it possible that you could explain it to me?
Thanks

No worries! This is for the TI-Nspire
1) On a new spreadsheet page, name the list in column A (let's call it proportion)
2) In the cell underneath (the formula cell - it's the bottom blue cell) enter the formula using Menu > Data > Random > Binomial and complete the formula as
=randBin(150,0.15,1500) [=randBin(sample size, population proportion, number of samples)]
This will generate your 1500 sample proportions

3) To view your distribution, go to a new 'Data & Statistics' page and click on the x-axis to add your variable (the previously created proportion)

[Syedali_]

In a random group n adults, the average number of adults with level between 1.4 and 1.8 was found to be 4.1 and Standrard D is 1.643  find n              normally distriubuted

Help

[Cyka]

Np= 4.1, sqrt(np(1-p))= 1.643, solve for n, should end up with 12

[kiki.]

Do we need to know how to graph derivatives on the exam?

[Sine]

Do we need to know how to graph derivatives on the exam?

what do you mean by that?
Because a dervitive is just another function and if the derivitive is a function that you are required to know you obviously would have to be able to graph it.

[Bri MT]

Do we need to know how to graph derivatives on the exam?

If you are shown a function you should be able to graph its derivative, even without being given any equation.

[LifeisaConstantStruggle]

Hi can someone help me with this question? Kinda got stuck on question ii) Thank you in advance

[Willba99]

Hi can someone help me with this question? Kinda got stuck on question ii) Thank you in advance

does it say if the events are independent? Because, if so:

Pr(B|A)=Pr(B)

[LifeisaConstantStruggle]

does it say if the events are independent? Because, if so:

Pr(B|A)=Pr(B)

nope, those are the only information they gave there might be an error with the question but thanks anyways

[gnaf]

no idea how to approach this! any hints?

[zhen]

no idea how to approach this! any hints?

Use the mean and variance formulas for binomial distribution.


I'd just solve these two simultaneous equations for n and p.

[gnaf]

thanks so much zhen 

[gnaf]

http://www.vcaa.vic.edu.au/Documents/exams/mathematics/2009mmCAS2-w.pdf

How do you do question 3g) using binomial distribution?

The examiner's report doesn't show how!