Pass Mark for CT3 April 2015

Hey,

So my paper didn't go really well. I found it tricky? Is it just me, or did others also think it was an extremely twisted paper? What do you guys reckon would be the pass mark?

I'm scoring around 60-65!

 

Ditto!
Optimistically I scored 60.. Don't think I will pass.. I wonder whether there will be solutions posted anywhere?

 

Ditto - but everyone I took it with found it hard as well. I'd be surprised if I got much more than 50. I think one of the questions may have been off the syllabus too - I'm sure one of the questions was show the variance of the beta estimator of the linear regression model, whereas it explicitly says in the course notes you don't need to be able to do this. I did e-mail them and I've not heard back, so I'll look again when the past paper is published to make sure i remembered the question correctly and chase again.

 

Yes, also I made some silly mistakes on easy questions and that makes me feel all the more terrible.

There was this one question on marginal probability density for 8 marks, in which I got the marginal densities wrong but I got the following questions of independence and expectation of the function right in terms of concept. Numerically, it was obviously wrong since we had to use the marginal density to answer the expectation and independence question.

I read on an Examiner's report that you are not penalized for the same mistake twice, does that mean that I'll get the marks for those two questions since the concept/formula used is correct, although numerically it is wrong?

I'm also worried about whether I even got the test-based direct questions right. The last 18 marker, I didn't know what to do in the last bit at all. Completely clueless.

And I couldn't do the variance of the beta estimator of the linear regression model too, so I really hope you're right and it was, in fact, wrong.

P.S. I say 60-65 optimistically too

 

I think they'll post the solutions in about 2-3 weeks on the website.

 

Any thoughts about the pass mark, John? Or are you not allowed to say?

One part of me wants to know the right answers to the questions to evaluate my possible (miserable) score, and the other just wants to erase the whole experience from my memory..

 

Any idea what the pass mark for UK may be this time around? Can I even hope to pass if we're scoring around 60?

 

Well i checked the syllabus as well as the course notes so I'm still not convinced its on the current syllabus even if it was asked on a paper in the past - I just read through the linear regression model section of the 2015 syllabus again and it says derive and calculate the slope parameter and perform statistical inference, but nothing about deriving the variance of it.

To be honest I'd be surprised if I passed even omitting that question so I can't be too annoyed!

 

Hi John!
Could you tell me if I'd get marks on this question?
Thanks!

 

Oh, thanks a ton! I don't believe I simplified it, the values were pretty simple. Easy question too, I just panicked I guess

Anyway, thank you!