I agree that this is an unfair question. It would be acceptable (I suppose)
if frequency density was spelt out as individuals 0.5 minute range --- but
since the times were measured to the nearest minute, this would be a very
curious choice.
I hope that students who reply 6 will get full marks!
I was mortified to find that in my own A level books I too have written
frequency density without any units --- so I cannot be too critical!
g
----- Original Message -----
From: "Charles Taylor" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, January 16, 2008 8:21 PM
Subject: A-level statistics question
> To understand this email requires reading the following link
>
> www.maths.leeds.ac.uk/~charles/S1Jan08Q3.pdf
>
> which is a scanned page from yesterday's maths A-level paper (Statistics
1).
> (allstat does not allow attachments).
>
> I am sending this as a follow-up to the discussion on "frequency density"
> which appeared a few months ago on allstat, but anyone who teaches first
> year students should find it of interest.
>
> If you have any comments, or would like to submit your answer, please send
it
> to me and I will collate and circulate. However, for starters I offer the
> following comment from an allstat colleague:
>
> "Placing trick questions in an exam in inexcusable, and the
> examiner and scrutineer (person who checked the paper) should
> be sacked."
>
|