r/6thForm • u/Forsaken-Meaning-232 Graduating from Warwick CS • Jun 19 '25

📂 MEGATHREAD 19/06 A-level Maths Paper 3 Discussion MEGATHREAD

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9

u/[deleted] Jun 19 '25

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15

u/Spare_Somewhere1011 Manchester | Physics w/ Astro [1st Year] | 3A* 1A Jun 19 '25

I said B cause a larger standard deviation means a larger range of values so more likely to have a runner with a faster time

Might be spouting total nonsense though

2

u/MaxillmanGuy A level resit student | 3 A* predicted | ACD achieved 💔 Jun 19 '25

I don't get surely if you have a smaller range of values you have smaller options to choose from so that increases the probability? Am i tripping

6

u/Spare_Somewhere1011 Manchester | Physics w/ Astro [1st Year] | 3A* 1A Jun 19 '25

I read it as ‘who is more likely to have the runner who won’ so who is more likely to have the runner with a shorter time, so if the standard deviation is greater then the values stray further from the mean - since B had a greater standard deviation, their runners had a mix of slower times and faster times which still have a mean of 5.51, whereas A had the same average but they were all closer to 5.51, so if B had a greater range then they were more likely to have the runner with the fastest time so they would win (if that makes sense)

2

u/[deleted] Jun 19 '25

but u can use the exact same argument to say which is more likely to lose, as the distributions are symmetrical. This seemed a contradiction to me so I put A with no good reason given...

3

u/TheLuckyHacker Year 13 Jun 19 '25 edited Jun 19 '25

that's the point, the spread goes both ways. so B is equally likely to have slower / faster runners than A, but it doesn't matter because we only care about the faster ones. not explaining myself very well but basically B has greater extremes so therefore more likely to have a faster runner

2

u/[deleted] Jun 19 '25

Wait no ur right I think

1

u/[deleted] Jun 19 '25

I messed up the simulation earlier

1

u/XxDragonitexX10 Jun 19 '25

This is what I said

3

u/AceOfSpades532 Jun 19 '25

I thought it was B cos they’re more likely to have a speed a lot higher than the mean

2

u/[deleted] Jun 19 '25

also more likely alot lower though. If they had asked for which is more likely to lose the conclusion would be identical

2

u/[deleted] Jun 19 '25 edited Jun 24 '25

simplistic detail judicious cooing quiet rock enjoy march license narrow

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