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    I thought it was pretty easy

    ................................ ................................ ...
    so far the majority got...

    1)[definitions of a sampling frame and a statistic]

    2)a)0.74

    3)0.0713

    4)c) 0.1216 d) 0.0024 e) Mean = 2 Variance = 1.8

    5)

    6)

    7)Median = 1.4 Mean = 1.27
    ................................ ................................ ...
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    yo bro russian ! mind getting a russian flag and putting it on as your avatar

    i thought it was extrmely easy and even easier than last jan..
    i finished the entire paper and had like 45 inutes left to spare for me to sleep or check my answers...went to about 3 toilet breaks and played with my flexy curve for awhile..

    i think the first 6 question was a piss....but the last one was a little choppy
    did you guys get it as a negative skew?
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    Yeah, I thought it was pretty nice.

    Especially after _royally_ screwing up P5 on monday, I needed a confidence boost.

    A few things to compare:

    I kept H0 on both hypothesis tests.

    For the continuous random variable I got F(x) equal to x/3 for the first block then (2/45)(x^4) + 13/45 for the second part. I got out a median of 1.48 and guessed the skew was -ve because mean < median.

    -Proteus
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    yo bro russian ! mind getting a russian flag and putting it on as your avatar
    did that


    For the continuous random variable I got F(x) equal to x/3 for the first block then 2x^4/45 + 13/45 for the second part. I got out a median of 1.48 and guessed the skew was -ve because mean < median.
    i got a greater value for the median, the rest i got the same as you
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    yea it was ok, i screwed up the last bit cos of some stupid mistake but the rest was pretty good.

    No one forgot the continuity correction for going from a poisson to a normal did they? That was about the trickiest bit of the paper.
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    :eek: I put scewness as positive.

    I thought that as median was higher than mean, that means at least 50% is above the mean?
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    [QUOTE=davedave]:eek: I put scewness as positive.

    Yea i done the same as you, but everyone else was sayin it was negative cos they got the median as 1.4 or something
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    i put the skewness as negative and got the same c.d.f as already mentioned, yay i thougt id f***ked that bit up!! wot about the mean, wot did people do/get for that?? otherwise piss easy paper - i hope i blagged the wordy questions enough!!
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    (Original post by davedave)
    :eek: I put scewness as positive.

    I thought that as median was higher than mean, that means at least 50% is above the mean?
    i put the same, but i think its wrong
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    i got a median of 1.4 something....
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    yeah i made the continuity thing 0.5 lower so that it made the area bigger as it was like "bigger than or equal to"
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    yer the median was 1.476 and the mean was 1.2 something, and with a mode of 2: mean < median < mode which means negatively skewed.

    that was a lot easier than Jan and last year's - finished in 35 minutes so i just checked over everything.

    Result!
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    yea that's rite. The median(1.4) was greater then the mean (1.21111? i think) therefore negative skew
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    **** i made a mistake on the mode...i put the 2 in the f(x) and gave that answer instead!! would it make a difference as the mode was still the largest number and i wrote:

    mean<median<mode and said it was negative skew....:-S
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    (Original post by clare_m)
    wot about the mean, wot did people do/get for that?? otherwise piss easy paper - i hope i blagged the wordy questions enough!!
    I got a mean of (571/450), or about 1.27 if you don't like fractions.

    -Proteus
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    The grade boundaries will probly go up rite, but by how much does n e one think? I reckon bout 64/75 for an A, sounds rite?
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    yep 571/450 was exactly what i got.
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    What about mean? I got 1.269, (571/450).

    And median of 1.476


    Edit: nm questions all got answered while I was posting
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    (Original post by Proteus)
    I got a mean of (571/450), or about 1.27 if you don't like fractions.

    -Proteus
    got the same
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    yeah i think a got a mean of something like that. remind me how u did ures as i'm not sure if it was right, i simply integrated f(x) times x , with the limits being the 2 and 1......:-S....which i thought seemed v. wrong!!

    and with the median i made F(x) ( the bit that was between 2 and 1) equal 0.5

    again seemed a bit wrong, but at the same time, sort of right...!!!

    please settle my mind. it may be wrong, but i dont care!!
 
 
 
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