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gcse statistics 27th June, how did you find it

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Original post by ihatehannah
yess knew it!


Did you get 6.2 ?
Original post by nisha.sri
Did you get 6.2 ?


6cm
Reply 82
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tab193
Original post by nisha.sri
I got like 0.8
150 I got
Reply 83
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tab193
Original post by nisha.sri
Oh ok ... I swear it's secondary
It was secondary
Original post by DD2508
What did everyone get for that question which was about flipping a coin and we had to say how many ppl downloaded music illegally?


I got 500 for part a- because P(head) is obviously 50%
part b 60- because 560 minus people who got head= 560-500
Reply 85
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tab193
Original post by ihatehannah
defo primary as the company itself is conducting the survey
It is secondary because they're getting the data from hospitals not weighing/measuring babies themselves
Reply 86
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ad4m
8
Original post by tab193
It is secondary because they're getting the data from hospitals not weighing/measuring babies themselves


thats what i put.. the question said ASK and it was data for the previous year.


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Original post by Hadleigh2k11
Yes I got that it's 0.6 + 0.5 = 1.1 - 0.25 = 0.85


Yes!!! Most others at my school got other answers, and I was starting to doubt my method was right.
Reply 88
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tab193
Original post by harry_16
Did anyone else get 150 forthe gradient?


Posted from TSR Mobile

I did!
what about P(X) x P(Y)?
I got 0.15... or was it 0.35?
Original post by tab193
I did!


I think I got 140.
Did you divide by 12?
Reply 91
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tab193
Does anyone have an unofficial mark scheme?
Reply 92
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tab193
Original post by M4keen04
I think I got 140.
Did you divide by 12?
I can't really remember what I did I just remember my answer
Original post by ihatehannah
fairly certain its 6cm, confirmed it with alot of people. 25/ r squared = N/n, idkkkkkk cud be wrong


I'm pretty sure it's right. Revised & practised this exacet type of Q night before.

I wrote 6.02 instead of rounding to 6 is that still correct?
Anyone know the shape of the normal distribution curve? I put 'bell shape' don't know why i couldn't think... [1]
And the question about what percentage lies between 2 s.d
I put 2sd is 0.4 x 2 = 0.8 and got 91.6 % ...
And the question about is it normally distributed? [2]
I put no because it has to be 95% or 99.8%, where as its 91.6%.. [2]
Original post by nisha.sri
Oh ok ... I swear it's secondary


It's primary because the company was doing the investigation and they collected the data so it was first hand
Original post by Hadleigh2k11
Anyone know the shape of the normal distribution curve? I put 'bell shape' don't know why i couldn't think... [1]
And the question about what percentage lies between 2 s.d
I put 2sd is 0.4 x 2 = 0.8 and got 91.6 % ...
And the question about is it normally distributed? [2]
I put no because it has to be 95% or 99.8%, where as its 91.6%.. [2]


It was positively skewed, and yep that's what I put!


Posted from TSR Mobile
Original post by Hadleigh2k11
Anyone know the shape of the normal distribution curve? I put 'bell shape' don't know why i couldn't think... [1]
And the question about what percentage lies between 2 s.d
I put 2sd is 0.4 x 2 = 0.8 and got 91.6 % ...
And the question about is it normally distributed? [2]
I put no because it has to be 95% or 99.8%, where as its 91.6%.. [2]


I wrote 100% are between 2 sds. I did mean - &+ 0.8 and saw that all the numbers were between the limits.
did anyone else do that? I had a feeling I did it wrong...
(edited 7 years ago)
Original post by harry_16
It was positively skewed, and yep that's what I put!


Posted from TSR Mobile


You got 91.6% ?
And also the question about histogram a and the first 21 people , what did you get? I got 110 but i don't think it's right
Original post by ihatehannah
6cm

That should be right majority got that answer

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