All of A-Level Statistics in under 45 minutes!

[@DrJamesMaths]

If this video has helped you out, I would appreciate it if you hit Like and Subscribe and if you are feeling extra grateful you could buy me a coffee via the super thanks button ☕

[@maromoro6824]

Don’t worry guys I’m lowering the grade boundaries for everyone

[@adude2927]

bro istg im struggling, ill be the one lowering them 😥

[@hoob6916]

That makes three of us

[@maromoro6824]

@@hoob6916trust bro I’m up early and still lost I’m bricking it

[@saki7596]

me too !!!

[@shahxil1292]

We’re in this together

[@genericyoutubechannel3591]

Thanks mate, wasn't taught stats properly and have mainly been revising for pure, hopefully ill at least get some right

[@DrJamesMaths]

Sorry to hear this, glad my video helped. Good luck for tomorrow, let me know how it goes!

[@andredgy7515]

does this the morning of exam, im cooked

[@blayneyshinners1859]

Same

[@thomaswalker9381]

same lmao

[@starulelaforeze4555]

2h before the exam....

[@hamzahfazal7203]

Here here

[@henrya3847]

im. cooked

[@DrJamesMaths]

Nah you've got this! Let me know how it goes

[@aroushansenthilkumar]

Thank you, Good luck for tmr!

[@DrJamesMaths]

You are welcome, let me know how tomorrow goes!

[@nathanielhd1751]

Night before people, wya?

[@c1pher266]

I'll watch this after 4-5months in June/July after my AS exams.. hopefully this video will clear all my concepts of S1 ...

[@Promise13]

Thanks for this video, ur amazing!! Helped to refresh my memory

[@DrJamesMaths]

You are welcome! Glad you enjoyed 😊

[@xlons]

the mechanics one was really helpful so thanks for doing this :)

[@DrJamesMaths]

No worries! Glad you liked it!

[@zingini52]

the real xlons !?!?

[@adzbest5621]

cookeed

[@DrJamesMaths]

Nah you've got this 💪 keep pushing

[@DrJamesMaths]

If you want to see how to do 27:31 on the calculator. Watch this video: kzbin.infofVXHWiKUhoc?feature=share

[@BodiAlsammarai]

Cooked

[@DrJamesMaths]

Let me know how it goes

[@AG-fl3kl]

Got about two and a half weeks 🤞

[@jessicabhamra5621]

This has really helped me before my exam tomorrow, a quick 45 minute revision, thank you great video

[@DrJamesMaths]

Glad it helped good luck tomorrow

[@jqwert909]

what exam was there 4 months again

[@denisminigarage2030]

​@@jqwert909 I think she is talking about a mock exam

[@patrykpierscinski1431]

At 34:53 , wouldn't you put X = 2 into your calculator, since the Binomial CD function on the calculator calculates the probability of everything up to and including the specified X value? I plugged X = 2 into my calculator as opposed to your X = 3 and got 0.0355 rather than 0.107. I think you calculated P(X≤3), but instead should have calculated P(X

[@NoceurXeno]

No, you don't calculate x = 2. You calculate P(X≤2). I think he got mixed up with normal distribution because it doesn't matter if you have ≤ or

[@frierenpout]

I calculated it manually. He gets it wrong a few times. Perhaps an annotation needs to be added for the mistakes otherwise valuable time will be wasted. I did it one by one on the calculator, checked the input three times. It is 0.0355. My exam board prohibits calculators with automatic probability functions.

[@amirah3791]

i feel like i always mix up pd and cd - honestly terrified for tuesday

[@DrJamesMaths]

If in doubt use cd, it's rarely pd

[@amirah3791]

@@DrJamesMaths thank you ! when are the instances to use pd ?

[@DrJamesMaths]

@@amirah3791 when you are trying to find the probability of a single value ie p(X=a), whereas cd is p(Xa)

[@fusion_]

34:10 How do you know if the found probability has to be greater than or less than to deduce whether or not to accept or reject the null hypothesis?

[@caliburn5141]

Compare it with the significance level. Keep in a mind a two tailed test means u half it

[@AG-fl3kl]

I thought the helicopter was over our house 😂

[@Johnny-go7to]

I'm cooked

[@ar-mo7xc]

On the page at 37:35 , how did you know you had to work out those probabilities for the lower tail and upper tail? Like where did p(x17) come from?

[@amirah3791]

37:50 i've done the whole calculator process and i got the same values for the lower tail but for the upper tail, my critical region was 17, since 16 = 0.8929 and 17 = 0.9645. did i miscalculate it somehow ? i was taught for the upper tail to look for 1 - SL (95% in this case) the rest of the table matches your work except those 2 and i don't know how i messed it up.

[@DrJamesMaths]

Yeah great question! Common misconception, it is hinted at earlier in the video but you need to do 1-p(X

[@amirah3791]

@@DrJamesMaths thank you so much ! i was so confused, this video has helped a lot 🤍 i’m awful at this section but this was super easy to follow

[@DrJamesMaths]

@@amirah3791 glad it helped! Good luck for next week!

[@itslynk01]

do you know if there is a textbook for 9ST0 statistics because I can't find one

[@hamburger7478]

pls may i ask why, at 35:53 we are not using P(X=3)? As I thought the question said there is only 3 person waited 10+mins. Thank you.

[@DrJamesMaths]

Its very subtle, it's because the doctor claimed there was a DECREASE in the number of patients, so we worked out the probability of a decrease and showed it was greater than the significance level

[@hamburger7478]

@@DrJamesMaths Oic, thank you!

[@PedroDaConceicao9]

at 10:30 isntthe answer 91/198 becaus eyou can pick the senior first or the junior first so there is 2 ways to get both when picked at random so the answer must be x by 2

[@TripleC-Games]

Wait that's the exact answer I got before he revealed the answer, I did it the way TL Maths taught, I really need to know which one is right and fast..

[@niceangrydad6554]

Is a level statistics good to do for engineering???

[@Ziyanasto]

10:42 could it not also be the other way round aswell? So a senior then a junior? (So we do (65/100) * (35/99) + 91/396?)

[@DrJamesMaths]

Yes using the "OR" rule doesn't matter which order you do it

[@richardbinu7653]

legit one of the best revision methods is just going through your channel. Exams tomorrow for me, wish me luck guys

[@DrJamesMaths]

Glad you find it useful! Good luck with the exam, let me know how it goes

[@otps8035]

27:04 why is it 25 and not 6?

[@ymg1233]

@29.02, where do you get that value from

[@Fl00rless]

Sigma = Square root of (15^2/5) Mew = 70 And use normal CD

[@Ngj22]

thanks for the vid Dr, is there any chance you could upload the documents divided into more pages? really hard to print atm

[@samilanjeganathan5248]

Did u find a way to print ?

[@hibasyeda5174]

@@samilanjeganathan5248 I screenshotted each page on to a word document.

[@Ngj22]

@@samilanjeganathan5248 nah, just watched video and made my own notes, which tbf is a good way to revise

[@cassiegaatbetalen]

if you google a level statistics notes you get the exact same notes hhahaha @@hibasyeda5174

[@AniketSingh-v5q]

how did you get the values of -1.0364 and 1.6449? I use a CG50

[@umaribrahim394]

use inverse normal Area 0.15 and 0.95 SD 1 Mean 0

[@SanuyeMiwok]

It's just amazing

[@ithmamuddin9199]

Ur saving my maths grade thank you so much

[@DrJamesMaths]

You are welcome! Glad you found it useful

[@Ar-jo7kq]

Hi, is there anywhere I can get this booklet without the working out so I can test myself?

[@DrJamesMaths]

Unfortunately not, sorry

[@TheDeskDestroyer]

atleast try to sound interested mate

[@DrJamesMaths]

I'm not here to sound interested, I'm here to get you results

[@oscarpeters5309]

its stats come on, just revise it and be done

[@akinatouge9763]

sounds like someone cant appreciate

[@DrJamesMaths]

@@akinatouge9763 maybe not

[@zwebb]

does this include all of AS?

[@DrJamesMaths]

Yeah it does, I didn't go into as much detail with the AS topics though

[@zwebb]

@@DrJamesMaths same thing for the mechanics vid?

[@DrJamesMaths]

@@zwebb no the mechanics vid is a bit more inclusive for AS

[@krypton1142]

i love u sm

[@DrJamesMaths]

I'm glad it helped!

[@JLKTHFC]

🐐

[@DrJamesMaths]

Thanks! Enjoy the video and good luck with the exam

[@aahad1]

Hi Dr James, would it be possible to do a Statistics A-Level paper (9st0) walkthrough? Thank you!

[@DrJamesMaths]

I tell you what, if I get to 1000 subs by 16th of October, I will go through any paper of your choosing

[@zakkhan3270]

@@DrJamesMaths did u achieve it?

[@henrybrown9122]

there is an error at 33:35 , if youre testing p(x

[@RobMartin-gz3zk]

I think it's a bad

[@owaisriaz3762]

is this for edexel or aqa maths?

[@DrJamesMaths]

It covers all basis, stats and Mechanics are pretty similar for applied maths

[@Zinko123]

Edexcel

[@dahabst4rdust]

is this both as and a2?

[@DrJamesMaths]

Yes it is

[@jasondhaya]

hey noah

[@DrJamesMaths]

Who is noah?

[@zingini52]

yeeeesss thank you so much ♥♥♥ :)

[@DrJamesMaths]

You are welcome! Good luck with your exam

[@xlons]

the real zingini52 !?!?

[@killswitch_mp3735]

How did u get answer for 22:28

[@ishmaelkeita6039]

normal cd mode on calculator. lower bound is 85 and upper bound is a very big number I usually use 9x10^99 and standard deviation is sqrt(varience) so sqrt(45) and mean is 70. which gives 0.01267365942 which rounds to 0.0127

[@tommyc5341]

I think it should be 0.8973 as he’s included the 120 value when it should be 119 and below I think

[@MrLeeR]

Superb 🎉

[@kameronchander]

thanks !

[@DrJamesMaths]

You are welcome!

[@bfex1443]

Thank you

[@DrJamesMaths]

You are welcome! Glad you enjoyed it

[@otps8035]

whats E(X)?

[@ofcmazza7617]

mean (n x p), the expected value in a discrete binomial distribution

[@16rah1M.]

Hopefully I'm wrong but isn't there a mistake at 10:33 as there are two ways to get that probability; 35/100 * 65/99 and then also 65/100 and 35/99. Surely you would then add these two probabilities, that's the way I've been taught. Anyway this video has been super helpful tysm!

[@DrJamesMaths]

You are right! Silly mistake from me. Well spotted, good luck with your revision

[@50sacinmysockidgaf]

how did you get the answer on calculator for 28:59

[@DrJamesMaths]

kzbin.infofVXHWiKUhoc?feature=share

[@SBtrainings]

same! i got 0.3694

[@bubble_queen4759]

square root the variance value to get the standrad deviation so instead of 45 do root 45