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    (Original post by jehearo)
    Shouldn't the outlier be 14?


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    I put 2 crosses at the front :O
    I dont know if it is right?
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    I'm gonna ask this again haha. I put the PROBABILITIES in the Venn diagram instead of the actual number of workers, would I get any marks? The probabilities were all correct btw.
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    (Original post by Freddy-Francis)
    for 1 f. to find the difference in temperature rite?

    I put my final answer as -7.5. will i still get the 2marks ?
    The mark scheme usually accepts ± answer.

    so ±7.5 should be accepted, providing you wrote showed correct method.
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    What happens if I put two solutions, one was correct, but I crossed it out? Method marks only?


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    I spent ages on first question and rushed the end questions
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    (Original post by GCSE-help)
    I'm gonna ask this again haha. I put the PROBABILITIES in the Venn diagram instead of the actual number of workers, would I get any marks? The probabilities were all correct btw.
    On the Jan 2012 S1 paper, for a Venn diagram question, they say the following in the mark scheme:

    "All values/100 or equivalent fractions award accuracy marks."

    Obviously in the case of this question, it would be 33/200 etc.

    so you should get all the marks, unless they decide to be strict and wipe of the accuracy marks.
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    (Original post by Freddy-Francis)
    I put 2 crosses at the front :O
    I dont know if it is right?
    There were only 2 outliers, 14 and 90.
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    (Original post by Graham981)
    There were only 2 outliers, 14 and 90.
    Yeh two outliers


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    Then I am expecting 50 - 56,
    If i am lucky a B rite?
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    (Original post by Graham981)
    There were only 2 outliers, 14 and 90.
    so i put 14 and 1 more extra with 90.
    Does that mean i get 4 marks? i did everything else rite on the box plot?
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    Hi,

    Yeah, with harsh marking on myself I gave myself 69 out of 75.

    Couple of Questions:

    If on the Venn Diagram Question, I didn't write the 0s (just left the bits with nothing blank), but I put all the other probabilities, how many marks would I get out of 4 for that question?

    For the product moment coefficient thing if I said 'p =' rather than 'r =' would I still get the marks?

    For the comparison of box plots, I said a few things. I said the median of the boys is greater than the girls, I gave numbers, I said the interquartile range was greater for the boys, I said what they were. I said they both have a positive skew. Would I get 2 out of 2 for this question?

    For the box plot question, I put my whiskers on my highest value that wasn't an outlier and my lowest value that wasn't an outlier, this is an accepted variation isn't it?

    Finally, this is a bit of a shot in the dark, but would they accept for that question which asked 'Why is the mean and s.d. not suitable', my answer, which said
    "Not suitable because the mid-point has to be used which is not as accurate as interpolation - the standard deviation would also not be accurate due to the innaccurate mean".

    Thanks!
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    For the venn diagram I put the right values in but I left only Bblank instead of writing 0. Will i lose a mark for this.

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    (Original post by EmmaiPhone)
    Anyone help? If I used 1490000 and 22400 instead of 1491222.222 and 22408.888 to work out the product moment correlation coefficient and the regression line - how many marks have I thrown away?
    I believe it is perfectly fine, because say you used the original values you would get :

    r=(-22,408.888…)/√(1,491,222.2…x 371.56) = -0.951994

    If you round this value to 3s.f., you get -0.952

    which would be the same answer you get if you used the values rounded to 3s.f.
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    (Original post by must try harder.)

    Got a bit stuck on the Venn diagram question. I figured that if the event B was that an employee takes the bus to work, B would be a subset of each three circles


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    I did this, would that have definitely been wrong?
    Did the three circles as mutually exclusive.
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    Name:  Venn Diagram Question Solution.png
Views: 325
Size:  5.3 KBWould this gain any marks for the Venn Diagram question? Anyone else get this?
    Thanks
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    (Original post by hellyesa)
    Hi,

    Yeah, with harsh marking on myself I gave myself 69 out of 75.

    Couple of Questions:

    If on the Venn Diagram Question, I didn't write the 0s (just left the bits with nothing blank), but I put all the other probabilities, how many marks would I get out of 4 for that question?

    For the product moment coefficient thing if I said 'p =' rather than 'r =' would I still get the marks?

    For the comparison of box plots, I said a few things. I said the median of the boys is greater than the girls, I gave numbers, I said the interquartile range was greater for the boys, I said what they were. I said they both have a positive skew. Would I get 2 out of 2 for this question?

    For the box plot question, I put my whiskers on my highest value that wasn't an outlier and my lowest value that wasn't an outlier, this is an accepted variation isn't it?

    Finally, this is a bit of a shot in the dark, but would they accept for that question which asked 'Why is the mean and s.d. not suitable', my answer, which said
    "Not suitable because the mid-point has to be used which is not as accurate as interpolation - the standard deviation would also not be accurate due to the innaccurate mean".

    Thanks!
    You are likely to lose at least 1 mark for leaving blanks rather than writing "0".

    for writing p= instead of r=, it is likely to depend on how strict they mark you, but since there is no other variable abbreviated "p", you should get the marks.

    For the box plot question, I wrote the same 1st two points, and I think you should get 2/2 unless you wrote something which contradicts your statements.

    However, I don't think you are likely to get the question regarding unsuitability of mean & stan. dev., due to incorrect use of the term interpolation, since interpolation & extrapolation regards to reliability of estimates, rather than accuracy.
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    (Original post by Olly2304)
    Name:  Venn Diagram Question Solution.png
Views: 325
Size:  5.3 KBWould this gain any marks for the Venn Diagram question? Anyone else get this?
    Thanks
    I did this too! Haha, i thought i was the only one. Surely it is still right?
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    Thanks for this!
    Lost a few silly marks but nothing too bad. I agree about the timing though, it was the slowest i've ever completed an S1 paper before!
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    (Original post by Undisclosed 15)
    For the venn diagram I put the right values in but I left only Bblank instead of writing 0. Will i lose a mark for this.

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    You are likely to, yes.
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    (Original post by Freddy-Francis)
    so i put 14 and 1 more extra with 90.
    Does that mean i get 4 marks? i did everything else rite on the box plot?
    Assuming you marked the outliers in the correct place, then yes, 4/4.
 
 
 
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