Suggested Answers and Discussion for Methods Exam 2

[BubbleWrapMan]

Was anyone else tripped out by the sample proportion of 0.06 in 3g? The probability of getting a sample proportion of less than 0.1 is less than 10^(-17), so they got pretty lucky.

[emilyb4398888]

In question 2, I didn't work out the normal properly, however the line was used to find different points of intersection and other information in sequential questions.

Would I be eligible for consequential marks? (The gradient of my normal was correct, I just mucked up the Y intercept)

[angrypotato1]

Was anyone else tripped out by the sample proportion of 0.06 in 3g? The probability of getting a sample proportion of less than 0.1 is less than 10^(-17), so they got pretty lucky.

that... doesn't sound right? I mean the correct mean was close to the confidence interval

edit: I got 0.0249 as a p value doing a hypothesis test

[Striddawg]

Okay so for question 4a) I think it was, where you need to express the rational function in the form a+b/(x+2) I used long division and got the same answer as on the recommended? I haven't seen anyone else use that method and as such I was wondering if I will lose the mark for working? Thanx x I got maybe 50% so like every mark is golden and yeah I kinda need a 30 so someone reassure me that I at least got that mark 

I also went with 1/8 for the computer question, it didn't specify no replacement so I assumed no replacement. Lmao I made so many mistakes in that paper so that's probably one too though

edit: I'm also in the same boat as emily- I got the equation of the normal wrong (y-int), and as such got an incorrect value for C and that affected like all of the rest of question 2. Any chance at consequential as it's an exam 2?

[emilyb4398888]

Okay so for question 4a) I think it was, where you need to express the rational function in the form a+b/(x+2) I used long division and got the same answer as on the recommended? I haven't seen anyone else use that method and as such I was wondering if I will lose the mark for working? Thanx x I got maybe 50% so like every mark is golden and yeah I kinda need a 30 so someone reassure me that I at least got that mark 

I also went with 1/8 for the computer question, it didn't specify no replacement so I assumed no replacement. Lmao I made so many mistakes in that paper so that's probably one too though

I used that method as well! I think it's a very viable way of doing it, and my teacher had taught me to do those sorts of problems that way also

[Striddawg]

I used that method as well! I think it's a very viable way of doing it, and my teacher had taught me to do those sorts of problems that way also

Okay that awesome  I'm also a spesh student and I almost caught myself using half angle formulas for f(x)=2f'(x)+pi, which could have been quite bad. But I couldn't think of any other way to simplify a rational function other than long division and I got really quite paranoid. Bless your entire heart for helping to put my mind to ease with that question at least xxx 

[iroze007]

For the last question (4fii) is drawing the graph of a(k) (with the asymptote) and Saying as k approaches infinity a(k) approaches zero and as k approaches 1   a(k) approaches 2.

[decentxion]

For the last question (4fii) is drawing the graph of a(k) (with the asymptote) and Saying as k approaches infinity a(k) approaches zero and as k approaches 1   a(k) approaches 2.

I did the same working in my suggested solutions. I thought this would be a more simpler way of tackling the question. You should be fine in that reasoning, as it didn't ask you to refer to the area of the triangle from previous questions.

[Biology24123]

I feel like 4f would have been 2 marks if it was assuming no replacement

[JellyBeanz]

I feel like 4f would have been 2 marks if it was assuming no replacement

Same, i think the mark distribution is rather confusing for that question.

[iroze007]

I cant believe i didn't just say f'(x)>0 therefore the func is strictly increasing. Instead I used a different method which I think makes sense. It is attached below. Do you think it would get the two marks.    Q4D

[harrys]

How have the year 11 boys gone, dropped 1 on paper 1 and 3 on exam 2 rip parents expectations of 50.

[MMAA16]

Does anyone know if consequential marks will be given for exam 2? For example, will finding an incorrect y-coordinate for a point and then subsequently using this in the calculation of a distance result in the deduction of more than one mark?

[iroze007]

I just wanted to put the 3f discussion to bed.

I spoke to my maths teacher who is the head of the maths teachers board (not exactly sure of the official title) and is a vce methods marker.

She said that the answer to 3f is 1/8

[natdogg]

Itute solns are out!  They assumed without replacement for 3f

http://www.itute.com/2016/11/04/free-download-2016-vcaa-mathematical-methods-exam-2-solutions/