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Christian LawsonPerfect 2 years, 4 months ago
Gave some feedback: Ready to use
Christian LawsonPerfect 2 years, 4 months ago
Saved a checkpoint:
This is a good question.
I've changed the titles of the films to randomlygenerated ones because (a) they were a bit stereotypically boyheavy and (b) they'll really date this question. There's also (c) are we allowed to use trademarks?
Elliott Fletcher 2 years, 4 months ago
Published this.Elliott Fletcher 2 years, 4 months ago
I have inverted the table and moved it into the statement and i have also added an extra part about Genre.
Elliott Fletcher 2 years, 4 months ago
Gave some feedback: Needs to be tested
Chris Graham 2 years, 5 months ago
Gave some feedback: Has some problems
Chris Graham 2 years, 5 months ago
Can we invert the table so that "Film" and "P(Film)" are columns? Also, the table and everything above it should be the question's statement, with the part beginning "100 people..."
It's a nice straightforward question, but you could add a little bit to this with an extra column "Genre", ie. action, comedy, sci fi etc. And then ask the student to calculate the expected number going to see a particular genre (of which there is say 2 films). Just make sure that you still have 'nice' numbers if you do this, so that the expected value comes to a whole number.
Lauren Richards 2 years, 5 months ago
 I think the question statement should just be right at the start of the advice.
 I actually think the two parts should be completely separate questions. There are definitely enough individual questions in part b) to make it a good lengthy question with i), ii) and iii) as individual parts that can be marked separately. You can relatively easily add in another question part for part a) to lengthen it if you wanted to. Maybe something about age ratings or something.
 b)ii) I would programme in a fraction with gap fills so they can answer it like that rather than getting them to do a fraction with no fraction sign and no instruction to do it like a/b.
 I think this is a great question, and I can't find very much wrong with it at all, well done Elliott!
Elliott Fletcher 2 years, 5 months ago
Gave some feedback: Needs to be tested
Hannah Aldous 2 years, 5 months ago
just a few things to comment on
 in the statement equation it says 'expected of times' which doesn't make sense
 maybe you could explain what p(film) is somewhere
 the way you have phrased '120 people buy tickets to see one of...' makes it sound like they all bought the same film ticket
 i think you can omit 'by rolling a 2 or 4' in b i as you say it twice
 in your advice for b ii you could maybe state the frequncy of outcome a bit clearer and after the equation
 maybe in your advice you could adapt it when the fraction can't be simplified to simply say it is in it's simplest form
 in advice for the last part you can omit 'using the experimental data' as you say it twice
Hannah Aldous 2 years, 5 months ago
Gave some feedback: Has some problems
Elliott Fletcher 2 years, 5 months ago
Gave some feedback: Needs to be tested
Elliott Fletcher 2 years, 5 months ago
Created this.Name  Status  Author  Last Modified  

Calculating Expected Values given a table of probabilities  Ready to use  Elliott Fletcher  20/11/2019 14:34  
Calculating expected values given a table of probabilities  Needs to be tested  Lauren Frances Desoysa  21/08/2018 15:22  
NumericalReasoning15  draft  Raymond Corrigan  16/09/2018 00:50  
NumericalReasoning16  draft  Raymond Corrigan  18/09/2018 12:05  
NumericalReasoning17  draft  Raymond Corrigan  18/09/2018 12:13  
Michael's copy of Calculating Expected Values given a table of probabilities  draft  Michael Proudman  19/11/2018 12:02  
Calculating expected values given a table of probabilities  draft  Ryan Poling  27/01/2019 16:37  
Simon's copy of Calculating Expected Values given a table of probabilities  draft  Simon Thomas  13/05/2019 09:55 
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