[clomitch]

(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

[ss2012]

(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

[nicknickmac]

(Original post by George_)
Yeah I did that!

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?

[nju]

any ideas on grade boundaries ???

[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

[ss2012]

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

[nicknickmac]

(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? x

[fayola1337]

What did you guys put as the skewness of the line graph? I thought it was negative but I'm not sure. :-/

[sreddy17]

(Original post by nicknickmac)
doesn't that come out as a negative number? x

0.92 to the power 20 doesnt!

[Bobzey3325]

(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.

[Bobzey3325]

(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

[George_]

(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.

[tissue_26]

(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

[nicknickmac]

(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

[nicknickmac]

(Original post by sreddy17)
0.92 to the power 20 doesnt!

ohhh to the power of 20, you wrote 0.92*20 haha :') x

[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

[sreddy17]

(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

[sreddy17]

first question did ppl just do 30/50 x 29/49 x 28/48

[alex7892]

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?

[Alotties]

(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