Statistics S1, Hate it.

I have the Edexcel Statistics S1 exam tomorrow, and i'm dreading it.
I find it really hard remembering all the formulas that aren't given; mean, standard deviation, varianca, probability, and the i find it difficult working out which formula i need to use for the question, :frown:

Anyone else doing the paper tomorrow?
Got any tips on how you remember the formulae? Advice?

Oh, and i really don't get how you find the median of grouped data, from the revision guide it looks pretty simple, but then trying to do it on a past paper question is proving quite difficult, without looking to the revision guide for help. :frown:

? ?

Reply 1

reem02

Im doing it.
All I did was practice the past papers. Now Im just going through formulas

Reply 2

supastah

2

0201Bean

I have the Edexcel Statistics S1 exam tomorrow, and i'm dreading it.
I find it really hard remembering all the formulas that aren't given; mean, standard deviation, varianca, probability, and the i find it difficult working out which formula i need to use for the question, :frown:

Anyone else doing the paper tomorrow?
Got any tips on how you remember the formulae? Advice?

Oh, and i really don't get how you find the median of grouped data, from the revision guide it looks pretty simple, but then trying to do it on a past paper question is proving quite difficult, without looking to the revision guide for help. :frown:

? ?

i feel the same I HATE STATS and im doing a s1 AQA paper tomorro,greattt!!!! isnt the median the middle number??

Reply 3

lookingatstars

Agreed i still can't do normal distribution. Imma fail

Reply 4

0201Bean

OP

12

supastah

i feel the same I HATE STATS and im doing a s1 AQA paper tomorro,greattt!!!! isnt the median the middle number??

I know! It's not even Maths imo. :frown:

Good Luck. :smile:

erm, yeah, that would work for if it wasn't being worked out for grouped data, but, apparently the mean and median are estimated from grouped data, and i can do the mean, but not too sure about the median...

Reply 5

0201Bean

OP

12

lookingatstars

Agreed i still can't do normal distribution. Imma fail

Normal distributions a ***** ¬_¬

:console:

You'll be fine. :smile:

Reply 6

supastah

2

0201Bean

I know! It's not even Maths imo. :frown:

Good Luck. :smile:

erm, yeah, that would work for if it wasn't being worked out for grouped data, but, apparently the mean and median are estimated from grouped data, and i can do the mean, but not too sure about the median...

do you use them big ugly blue statistical calculata?

Reply 7

gman2k8

hahaha I've only just opened my book to revise it for first time, gonna be a late night for me. Been concentrating on FP1.

Reply 8

0201Bean

OP

12

gman2k8

hahaha I've only just opened my book to revise it for first time, gonna be a late night for me. Been concentrating on FP1.

I'm doing FP1 aswell, but isn't that like late June? :L

Lol, good luck with that, i've been at this since Monday, and still can't get the hang of some of the stuff :frown:

Reply 9

Slowbro93

20

To work out the median on grouped data, you need to work out the median class, then use interpolation. This video is good.

http://www.youtube.com/watch?v=hFVsw73bxmg

Reply 10

steph_v

13

I don't know any forumalae, I use my lovely, lovely calculator that does everything for me. I wouldn't be getting 95% on the past papers without it, I'd probably be getting about 50%. It's a risk, though, because I can't get any method marks, so I need to make sure I check my answers really carefully.

Reply 11

0201Bean

OP

12

supastah

do you use them big ugly blue statistical calculata?

nope, just Efx/f or Ex/n for the mean

and the sqrt:variance for standard deviation :P

Reply 12

gman2k8

0201Bean

I'm doing FP1 aswell, but isn't that like late June? :L

Lol, good luck with that, i've been at this since Monday, and still can't get the hang of some of the stuff :frown:

I'm on OCR MEI for my FP1 :smile:

. Best of luck!

Reply 13

himegan

haha seriously anyone who doesnt like/cant do stats, should invest in one of the big calculators, they do the majority of the work for you :wink:

Reply 14

CheeseToasty21

8

ahh stats, can't wait :wink:

Calculator!!!!!!

nada1

Calculator!!!!!!

Whats so great about having a calculator?

Reply 17

himegan

Kash:)

Whats so great about having a calculator?

:O!!!
it calculates the line of regression (providing you enter x and y values)
calculates PMCC
it does the binomial distribution and the normal distribution.
its a godsend! it saves so much time! but like someone said, if you enter a wrong number in by mistake and dont realise it, youre pretty screwed.
but just write down the method and you'll get some method marks!