AQA AS Statistics 1B 20th May 2015 - After Exam

I wrote down most of my answers
Question 1 - mode 10 median 11 IQR =4 and mean = 11.8

for the probability question i got 0.36,o.16,0.032,0.12 and 0.192

I know what you mean about the probability question, i just tried to go about it as logically as possible

Reply 3

for the first 4 i got:
10, 11, 4, 11.8
0.106, 1, 0.470, 1.29
0.748, 0.195
0.36, 0.0272, 0.0540, 0.17, 0.163
and for the line y = 67.65 + 10.01*x
for the first we found the same, i seem to have screwed up the with probabilities :3, what about the rest?

Reply 4

For the second one i got 0.9696 not 0.47 but the rest are all the same
For probabilities i don't really know whether i got them right or not - what method did you use?
I remember i got the same y value as you
The only other question i wrote down was 6. 0.0565, 0.9433 AND MEAN = 66 Variance = 44.2

Reply 5

for the 0.47 i think it was with the calculator (it was an interval right?)for the probabilities i did the same as the paper of june 2014 (i think) for the first two. for the last part i did a table like the one they gave us

Reply 6

For the mean.. Since its 2 marks and its just putting the numbers on the calculator.. Dont we need to put 12 as the final answer to get 2 marks? XD since it will be 12 pssengers not 11.8 xD .. Not sure but i think that may be what they would be looking for for 2 marks?

Reply 7

Oh and btw.. Correct me if im wrong but ive forgotten.. For the last question on the normal distribution question.. It says find the standard deviation right? Not variance?

Reply 8

I do remember it saying variance as i had to look it up in the booklet but i could be wrong

Reply 9

for the mean i dont think they care about the s.f, so we should both the get the marks (1 for the working and 1 for the answer)
i am not sure but i think it was variance

Reply 10

Btw is there anyone like Arsey that posts the solutions in statistics?

Reply 11

bowtiemegan

Original post by JamestheYorks

Hey everyone how did everyone think the exam when and what answers did you get?

The paper was alright, the probability question sucked, and I knew I should have rounded 11.8 passengers to 12! damn!

Reply 12

Shooot i did standard deviation.. Didnt square it .. Damn it

Reply 13

Original post by reborn97

for the mean i dont think they care about the s.f, so we should both the get the marks (1 for the working and 1 for the answer)
i am not sure but i think it was variance

What working? I swear we just had to input it in the calculator:/

Reply 14

Original post by JamestheYorks

What was the mean for? XD Cant remember whether they asked us to work out the mean in the normal distribution?:/

Reply 15

bisade

Original post by fmb2970

Shooot i did standard deviation.. Didnt square it .. Damn it

what did you get for your sd?

Reply 16

Original post by bisade

what did you get for your sd?

Im not sure but it was a small number..:/

Reply 17

Sooo annoyed.. Just realised i looked up 0.995 instead of 0.99 .. So will ruin my whole answers.. Do you think i'd still get a mark for doing the right method?;'( or i'd lose all the 6 marks available? This is what i hate about this.. If you mess one up.. You mess up the whole thing.. Considering it was an easy paper the grade boundaries will be high.. So i think i just lost my chance of getting an A.. :frown:

Reply 18