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OCR MEI Statistics 1 (S1)

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Original post by nicknickmac
for the probability of the third person using that browser? yep i did too :-)

for the next question about 2nd or 3rd person did anyone do (.92 x .92 x .8) + (.92 x .8)?


Yes I did that :smile:
Reply 61
Original post by EmmaJane_
Left revision far too late and couldn't answer half of the questions.
Facepalm.


Same here 'poker face :/

This was posted from The Student Room's Android App on my GT-I9100
Original post by George_
Yeah I did that! :biggrin:

And for the mean and SD question I got 1890.625 = mean, 890 something = sd.


I got the same mean as youuu but my sd was like 849.. did you remember to divide by n-1? rather than just n?
Reply 63
any ideas on grade boundaries ???
did people put for one of the question i think it may have been the broswer one where there were 20... did u guys do 1- (p that none had used the browser) which was 1 - 0.92*20
Reply 65
I failed that paper. I really hope its a low grade boundary

This was posted from The Student Room's Android App on my GT-I9100
Original post by sreddy17
did people put for one of the question i think it may have been the broswer one where there were 20... did u guys do 1- (p that none had used the browser) which was 1 - 0.92*20


doesn't that come out as a negative number? :confused: x
What did you guys put as the skewness of the line graph? I thought it was negative but I'm not sure. :-/
Original post by nicknickmac
doesn't that come out as a negative number? :confused: x


0.92 to the power 20 doesnt!
Reply 69
Original post by nju
any ideas on grade boundaries ???


Not sure but the previous ones would suggest that it would be around 55-60 depending on how everyone did.
Reply 70
Original post by fayola1337
What did you guys put as the skewness of the line graph? I thought it was negative but I'm not sure. :-/


it was definitely negative
Reply 71
Original post by nicknickmac
I got the same mean as youuu but my sd was like 849.. did you remember to divide by n-1? rather than just n?


Yeah, I probably did get 849. Just can't remember :P Mixing up 1890 and 890 :P

Definitely got 1890.625 though.
Reply 72
Original post by fayola1337
What did you guys put as the skewness of the line graph? I thought it was negative but I'm not sure. :-/


I put it was negatively skewed but almost symmetrical :s-smilie:
Original post by George_
Yeah, I probably did get 849. Just can't remember :P Mixing up 1890 and 890 :P

Definitely got 1890.625 though.


fab :biggrin:
Original post by sreddy17
0.92 to the power 20 doesnt!


ohhh to the power of 20, you wrote 0.92*20 haha :') x
Reply 75
For the 20 people with the browser question, what did people do?

I did 1 - P(X=0) with X~B(n,p)

to get 1 - 20C0 * 0.08^0 * 0.92^20 which just = 1 - 0.92^20 = 0.8113
Original post by George_
For the 20 people with the browser question, what did people do?

I did 1 - P(X=0) with X~B(n,p)

to get 1 - 20C0 * 0.08^0 * 0.92^20 which just = 1 - 0.92^20 = 0.8113


ye i did that i just wrote it! haha
first question did ppl just do 30/50 x 29/49 x 28/48
Reply 78
What did you guys get for the revenue one for the governemt for the cars?
did you do 25/80 x 15000000 or whatever?
the x by 1000?
Reply 79
Original post by George_
For the 20 people with the browser question, what did people do?

I did 1 - P(X=0) with X~B(n,p)

to get 1 - 20C0 * 0.08^0 * 0.92^20 which just = 1 - 0.92^20 = 0.8113


That's what I got too as far as I remember :smile:

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