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    (Original post by MirindaCream)
    Also for last two questions were answers 0.04 and 0.02884
    I got 0.04, but 0.072 for the second one
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    I thought it was ok however I did not get the variance of the apples question, also got 0.9 for spearmans rank
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    (Original post by MirindaCream)
    Also for last two questions were answers 0.04 and 0.02884
    Same
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    What did you guys get for the mean of n in the regression question and for the last arrangement question ?
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    (Original post by Jamesk123)
    I thought it was ok however I did not get the variance of the apples question, also got 0.9 for spearmans rank
    I got the same spearman's, the variance is just the standard deviation squared
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    i got 0.0864 for the last one
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    (Original post by Jamesk123)
    What did you guys get for the mean of n in the regression question and for the last arrangement question ?
    I got 6.5
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    Mean of apples was kike 146.5 and variance was 21.75. Sum on m2 was 1117168.
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    These were my answers (start an unofficial MS?) No questions numbers yet though and I think my Perms & Combs answers are likely wrong
    0.81
    0.216
    0.924
    Written Answer
    Written Answer
    20.9
    250.8
    1755.75
    23218
    13 apples
    No outliers
    rs = -1
    Graph of dots for rs
    rs = 0.9
    0.414
    0.147
    Variance = 6
    0.160
    0.514
    27720
    210
    1/210
    0.114 (4/35)
    Written Answer (Conditions for geometric I think)
    0.128
    0.893
    0.854
    0.04
    0.072
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    (Original post by duncant)
    Mean of apples was kike 146.5 and variance was 21.75. Sum on m2 was 1117168.
    Yeah i got that. rounded the answer though to 3sfs
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    (Original post by duncant)
    Mean of apples was kike 146.5 and variance was 21.75. Sum on m2 was 1117168.
    I got that too 👍
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    I got 0.0864 for the very last one
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    I got 0.0864 because either Marie fails twice and nadia succeeds twice (0.8^2*0.3^2) or Marie scores, nadia scores, Marie fails, nadia scores (0.8*0.2*0.3^2) or Marie fails nadia scores Marie scores nadia scores (same thing) so it's (0.8^2*0.3^2) +2(0.8*0.2*0.3^2).
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    (Original post by ukgjyhtrhv)
    i got 0.0864 for the last one
    I got the same too
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    Can someone make the interactive google doc so we can all add our answers to create an unofficial ms
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    (Original post by paccap)
    Yeah i got that. rounded the answer though to 3sfs
    Same
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    1/105 probability to get ABBA? only one im not sure on
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    (Original post by madberry1)
    I got 6.5
    ditto that was a weird q imo
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    How were you meant to work out the total output for the year?
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    For the abba question, what did people do? I think I put the wrong numbers into the calculator, but my method was:
    3/7 * 2/6 * 2/5 * 1/4 (picking the letters AABB).
    There are 6 ways to arrange AABB, so multiply by 1/6. This gets 1/420. I think then multiply by 4! as it does not matter what order we pick the cards from the initial 7.
 
 
 
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