AQA Official Maths S1/B Thread Watch

kazoo
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#41
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#41
for that one with kirks claim, did people end up getting 0.4, so his claim was valid?
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Candy_Shop
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#42
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#42
(Original post by kazoo)
for that one with kirks claim, did people end up getting 0.4, so his claim was valid?
I said its valid cause the means were equal. But the standard deviations were different so I said his ability varys more than he claims. I cant remeber exact figures tho.
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Ninja32
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#43
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#43
(Original post by Candy_Shop)
I said its valid cause the means were equal. But the standard deviations were different so I said his ability varys more than he claims. I cant remeber exact figures tho.
too true....therefore i justified his claim to an extent as he still wins the same number of games on average
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ragchez
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#44
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#44
yea they exam went better than i thought, hopefully i didnt make too many stupid mistakes. I found it easier than the core papers, but that just me. What did u guys think?
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Swinely
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#45
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#45
(Original post by tek290)
I got the original value of B= -3.25, the garage guy said they would deflate twice as quick so i just changed B= -6.5. Then put in 8 months and you ended up with about 213 kpa which was lower than 220.
lol thats what i did too, as i had no idea because we were always told y=bx +a, not y = ax + b like it was!! so i had to change everything so this worked lol.

To work out the standard dev i think i just did something random like nXp/ average? something like that anyway.

on the darts i also got the means were equal, but using that fomula from above i got the standard dev of like 9.4 at first, and then something a lot smaller when given the values?

I made quite a few screw ups in that paper, like hte very last question working the things out instead of explaining what they mean.
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