# S1 edexcelWatch

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#1
How did people find it?
0
16 years ago
#2
Well, the answer to the normal distribution was 0.07 something.
And the discrete random variable question was butt easy!
Are the events A and B mutually exclusive / independent????
How did you guys do the last question about the keys?... I found the three different combinations and added them getting somting like 5/12 (don’t remember what I got)…. Ps if any answers are posted.. I would be glad to have a look at them  peace out!

PS what i think
chirag
0
#3
yer thats what i got
0
16 years ago
#4
(Original post by Asha)
How did people find it?

I postponed this exam til june as I wasn't fully preapred for it.

S1 is a nuisance!
0
16 years ago
#5
(Original post by eddiedaboss)
I postponed this exam til june as I wasn't fully preapred for it.

S1 is a nuisance!
Mechanics 1 is way better!
0
16 years ago
#6
6)For the Last 2 probablity questions i got 5/12 and 5/12 again.
also something like 2/3*1/2*1/4 or other way round for the fist easier
question

5)The interqautile range was about 300 something
The mean 380 sd 256. Not exactly.
I put use the median and interquartile as not effected my extremes
and can see skewness

3) P(AnB)= 0 therefore mutually exclusive NOT independent

P(A/not B)*1-P(B)= P(ANnot B)

P(AorB)= P(A) + P(B)

2)P(less than 2.7)= f(2)= 11/12
P(3 to 1) + F(3)-F(1)
E(X)= 11/12 cant rember exact
E(2X-3)= something negative
Var(x) = 107/144 cant rember exactly

2)Normal 0.076..

1)b=0.204
a= 6.something
I was nt sure but i put both 9am and 1 month later wouldnt work as extrapolating.

Not sure im right hope i got better than my 50 last time!
ANyone disagre/agree?
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16 years ago
#7
I did S1 in June 2003 and it was pretty easy that paper. I ended up with 88/100 but i couldve got over 95 easily if it wasnt for sum stupid mistakes....
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#8
yer same here, that was a well easy paper, as was the p1 in june 2003
0
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