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Christian LawsonPerfect 2 years, 1 month ago
Gave some feedback: Ready to use
Christian LawsonPerfect 2 years, 1 month ago
Saved a checkpoint:
Split the first part, about basketball, into a separate question.
Added random names.
Changed the randomisation of the probabilities so that everyone is pulled from the same distribution (apart from the missing person, who accumulates the error when the probablities for the others are rounded off)
Elliott Fletcher 2 years, 2 months ago
Published this.Elliott Fletcher 2 years, 2 months ago
Gave some feedback: Needs to be tested
Stanislav Duris 2 years, 2 months ago
Gave some feedback: Has some problems
Stanislav Duris 2 years, 2 months ago
This is a nice question, but I have some comments.
 While the parts are very clear, I feel like it looks a bit daunting that the statement is almost as long as the whole question. I would personally put some of the statement in the advice (so the first time they do the question you test them on this and the next time they redo it, they'll know all this helpful information) but it is up to you.
 Part a) is a good simple question. Just a tiny unnecessary comment, your Hoop variable has a description of "Denominator for probability that your car runs out of fuel before you get to Leeds", I assume that this was how you first wrote the question and changed it to a different situation afterwards forgetting you have to fix your variable description.
 Also, you used random(5..9 #1) in your variable, a step size of 1 is the preset setting so the #1 is unnecessary there. It isn't wrong at all and you should keep it there and maybe you realise this, I just thought to let you know in case you need to use random integers in future so the job is a bit easier for you.
 Also, when Hoop = 7, Numbas does not accept the decimal form of the answer my calculator gives. I don't know if this is a big deal, but maybe some students would try to put decimal forms instead of fractions in. Maybe you could say in the question put your answer as a fraction?
 Part b)  I am not 100% convinced about pass the parcel being the right game for this question, but it is not a big deal.
 I feel like it would be better to swap parts i) and ii), because to get the answer to part i), you already had to calculate the answer to part ii). Maybe the order is like it is right now because you were aiming to test whether they realise this so if that is the case, that's fine.
 The advice for part b)ii) is maybe a bit too complicated considering how simple it is in reality, especially when one of the methods you use is the same as in part a). I think putting the second method first would maybe be better.
 If you swap parts i) and ii): in advice for the new part ii) (calculate the probability of Dexter winning), you could use P(E) = 1  P(E'), a slightly different turn on the equation for complementary probabilities. This would make part b)ii) a bit different from part a).
 You use latex for $P(.)$ which is fine but I would personally use $\mathrm{P}(.)$ as it looks nicer in my opinion. This is coded as
$\mathrm{P}(.)$
.It is a good question as it is right now. This is all just my personal opinion of what you could change so it is up to you to decide which things are better now and which things would be better changed.
Elliott Fletcher 2 years, 2 months ago
Gave some feedback: Needs to be tested
Elliott Fletcher 2 years, 2 months ago
Created this.Name  Status  Author  Last Modified  

The probability of an event not happening  five friends play mini golf  Ready to use  Elliott Fletcher  01/08/2017 12:10  
Probability of scoring at basketball given probability of not scoring  Ready to use  Christian LawsonPerfect  01/08/2017 12:10  
Hugh's copy of The probability of an event not happening  five friends play mini golf  draft  Hugh O'Donnell  16/01/2018 13:48  
Simon's copy of The probability of an event not happening  five friends play mini golf  draft  Simon Thomas  08/05/2019 09:46  
Maria's copy of Probability of scoring at basketball given probability of not scoring  draft  Maria Aneiros  27/05/2019 02:29  
The probability of an event not happening  five friends play mini golf  draft  Xiaodan Leng  11/07/2019 02:02  
Probability of scoring at basketball given probability of not scoring  draft  Xiaodan Leng  11/07/2019 02:03 
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This question is used in the following exams:
 Probability by Elliott Fletcher in Elliott's workspace.
 Probability by Elliott Fletcher in Elliott's workspace.
 Probability by Christian LawsonPerfect in Transition to university.
 Questions using the random person extension by Christian LawsonPerfect in Christian's workspace.
 Introduction to Probability by Robert Aykroyd in Robert's workspace.
 Probability by steve kilgallon in Stats and probability.
 Introduction to Probability by Katie Bullen in Katie's workspace.
 NUMBAS  Probability by Katy Dobson in Katy's workspace.
 Probability by Simon Thomas in Stats.
 Maria's copy of Introduction to Probability by Maria Aneiros in Maria's workspace.
 Probability Revision by Yvonne Wancke in Yvonne's workspace.