cheers, thats what i thought.(Original post by tazza ma razza)
read through the thread, i asked this about 2 hrs ago.
you apply sxy and sxx etc using the ranks not the actual data
You are Here:
Home
> Forums
>< Study Help
>< Maths, science and technology academic help
>< Maths
>< Maths Exams
|
Edexcel S3 - Wednesday 25th May AM 2016 watch
-
- Follow
- 781
- 23-05-2016 20:46
-
tazza ma razza
- Follow
- 25 followers
- 18 badges
- Send a private message to tazza ma razza
- Community Assistant
Offline18ReputationRep:Community Assistant- Follow
- 782
- 23-05-2016 20:50
Does anybody have the paper asking to test if normal distrubtion is a suitable distrubtion?
-
tazza ma razza
- Follow
- 25 followers
- 18 badges
- Send a private message to tazza ma razza
- Community Assistant
Offline18ReputationRep:Community Assistant- Follow
- 783
- 23-05-2016 20:59
when doing ch 5 stuff - pmcc and srcc - do you use the ρ in both cases when writing H0 and H1?
Last edited by tazza ma razza; 23-05-2016 at 21:04. -
coolguy123456
- Follow
- 12 followers
- 2 badges
- Send a private message to coolguy123456
Offline2ReputationRep:- Follow
- 784
- 23-05-2016 21:04
(Original post by tazza ma razza)
read through the thread, i asked this about 2 hrs ago.
you apply sxy and sxx etc using the ranks not the actual data -
physicsmaths
- Follow
- 143 followers
- 18 badges
- Send a private message to physicsmaths
Offline18ReputationRep:- Follow
- 785
- 23-05-2016 21:04
(Original post by tazza ma razza)
when doing ch 5 stuff - pmcc and srcc - do you use the ρ in both cases?
Posted from TSR Mobile -
tazza ma razza
- Follow
- 25 followers
- 18 badges
- Send a private message to tazza ma razza
- Community Assistant
Offline18ReputationRep:Community Assistant- Follow
- 786
- 23-05-2016 21:04
Last edited by tazza ma razza; 23-05-2016 at 21:09. -
tazza ma razza
- Follow
- 25 followers
- 18 badges
- Send a private message to tazza ma razza
- Community Assistant
Offline18ReputationRep:Community Assistant- Follow
- 787
- 23-05-2016 21:08
(Original post by coolguy123456)
I haven't seen a question like this, have you come across one where they've used ranks to calculate PMCC? Textbook and past paper questions only use the data itself to calculate PMCC. -
- Follow
- 788
- 23-05-2016 21:12
(Original post by tazza ma razza)
Yh, but then ranking would be pointless wouldn't it. Ie you would go straight to the pmcc without ranking. -
coolguy123456
- Follow
- 12 followers
- 2 badges
- Send a private message to coolguy123456
Offline2ReputationRep:- Follow
- 789
- 23-05-2016 21:13
(Original post by tazza ma razza)
Yh, but then ranking would be pointless wouldn't it. Ie you would go straight to the pmcc without ranking. -
justalawyer1998
- Follow
- 11 followers
- 3 badges
- Send a private message to justalawyer1998
Offline3ReputationRep:- Follow
- 790
- 23-05-2016 21:13
Really cba to go back to S1 and S2 after this
-
tazza ma razza
- Follow
- 25 followers
- 18 badges
- Send a private message to tazza ma razza
- Community Assistant
Offline18ReputationRep:Community Assistant- Follow
- 791
- 23-05-2016 21:14
(Original post by Nikhilm)
Really cba to go back to S1 and S2 after this -
paradoxequation
- Follow
- 0 followers
- 2 badges
- Send a private message to paradoxequation
Offline2ReputationRep:- Follow
- 792
- 23-05-2016 21:15
(Original post by kennz)
If you are calculating spearmans rank and two units have the same rank, you take an average of that rank and the next and then use PMCC. How would you use PMCC if the data is ranked/ordinal? -
tazza ma razza
- Follow
- 25 followers
- 18 badges
- Send a private message to tazza ma razza
- Community Assistant
Offline18ReputationRep:Community Assistant- Follow
- 793
- 23-05-2016 21:16
(Original post by coolguy123456)
So if they've given data which they've asked to calculate SPCC and then part b for example says 2 ranks are now tied, use PMCC, would we calculate Sxx, Syy, Sxy using the ranks (including the now tied rank)?
eg sxx = sum of x^2 - (sum of x)^2 /n , where x is the rank, not the data
then multiply the 2 ranks as per for sxyLast edited by tazza ma razza; 23-05-2016 at 21:17. -
physicsmaths
- Follow
- 143 followers
- 18 badges
- Send a private message to physicsmaths
Offline18ReputationRep:- Follow
- 794
- 23-05-2016 21:18
(Original post by tazza ma razza)
Yh, but then ranking would be pointless wouldn't it. Ie you would go straight to the pmcc without ranking. -
connorbarr
- Follow
- 2 followers
- 2 badges
- Send a private message to connorbarr
Offline2ReputationRep:- Follow
- 795
- 23-05-2016 21:18
(Original post by Zacken)
Yep, but I doubt the case will arise. -
- Follow
- 796
- 23-05-2016 21:25
(Original post by connorbarr)
has come up on a past paper i remember, asked you why the degrees of freedom was this value and it was a contingency table, had to combine some frequencies cos one was less than 5 -
tazza ma razza
- Follow
- 25 followers
- 18 badges
- Send a private message to tazza ma razza
- Community Assistant
Offline18ReputationRep:Community Assistant- Follow
- 797
- 23-05-2016 21:25
(Original post by connorbarr)
has come up on a past paper i remember, asked you why the degrees of freedom was this value and it was a contingency table, had to combine some frequencies cos one was less than 5 -
connorbarr
- Follow
- 2 followers
- 2 badges
- Send a private message to connorbarr
Offline2ReputationRep:- Follow
- 798
- 23-05-2016 21:26
(Original post by tazza ma razza)
june 15 ial -
- Follow
- 799
- 23-05-2016 21:27
(Original post by connorbarr)
no lad i havent done that paper
(Original post by tazza ma razza)
june 15 ial -
tazza ma razza
- Follow
- 25 followers
- 18 badges
- Send a private message to tazza ma razza
- Community Assistant
Offline18ReputationRep:Community Assistant- Follow
- 800
- 23-05-2016 21:29
(Original post by connorbarr)
no lad i havent done that paper
- 2016 A-Level Exam Threads Directory!
- Post your A-level exam timetable
- Edexcel AS Mathematics C2- 25th May 2016 Thread
- Edexcel AS Mathematics C1/C2 - 18th/25th May 2016 - Official ...
- 2017 Unofficial Markscheme List - GCSE and A-Level
- Edexcel C2 20th May 2015 *Official Thread*
- The Current Year 12 thread 2016-2017
- The Official Cambridge Offer Holders Thread 2016 Entry MK II
- Imperial College Applicants 2016 entry
- STEP Prep Thread 2016
-
University of Bristol
-
University of St Andrews
-
University of Manchester
-
Heriot-Watt University
-
Royal Holloway University of London
-
Coventry University
-
Teesside University
-
Finance and Mathematics (Including Foundation Year)
University of Essex
-
University of St Andrews
-
University of Oxford
We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.
- SherlockHolmes
- Notnek
- charco
- Mr M
- Changing Skies
- F1's Finest
- rayquaza17
- RDKGames
- davros
- Gingerbread101
- Kvothe the Arcane
- TeeEff
- The Empire Odyssey
- Protostar
- TheConfusedMedic
- nisha.sri
- claireestelle
- Doonesbury
- furryface12
- Amefish
- harryleavey
- Lemur14
- brainzistheword
- Rexar
- Sonechka
- TheAnxiousSloth
- EstelOfTheEyrie
- CoffeeAndPolitics
- an_atheist
- Labrador99
- EmilySarah00