Mr Bicen, remember me? I am that girl from two days ago, I knew nothing of alevel Stats and Mechanics two days ago! I just came out of paper 3 and I think if I haven't made too many mistakes, It is going to be an A*. :) What I did in two days was watching all of your statistics videos on 1.75x speed and read through all the PMT mechanic cheat sheets, and did the past paper3s from 2019-2021. Call me the Queen of Cramming! However I did not put any work in for my other exams and I expect my overall grade to be A and I will miss my offer. If only I just put in a little more work....even just a day more, I could of done so much better, *sigh*. If I can get so much done in two days and learn so fast, why didn't I do it earlier and why did I refuse to study for the last three years... Why did I do that to my self? Any ways, You saved me. After not studying for 3 years, my attention span have deteriorated so much that I could never learn the entire statistics content by reading from the text book, I get distracted too easily, but I did it by watching your videos. It was much needed bcs Alevel Mechanics is quite intruitive and comes naturally without much studying, but Statistics actually requires studying and memorisation. Couldn't have done it without you.
can I skip learning binomial distribution when learning about normal distribution ? or do I have to know about binomial to help understand normal distribution ? *btw love your videos, they're very useful:)
Binomial and normal are totally separate ideas, so you can learn them separately. But you will eventually need to know both, as they will both be assessed! (There’s also one small area of normal that involves binomial, but only a little bit)
Thank you for answering that quick 😅. I haven’t got enough time to cover everything.Also another qs, in stats I’ve noticed how first three three chapters (data collection,location of measure and representation of data ) all link together (so you kinda have to do the previous one to understand the next ) is that the same with the last three chapters (probability, statistical distribution and hypothesis testing )?
So the the last three chapters are linked, but the strongest links are between 6 and 7 (statistical distributions and hypothesis testing). You literally can’t do Chapter 7 without doing Chapter 6. Chapter 5 supports Chapter 6 slightly, but Chapter 5 is mostly GCSE probability (tree diagrams, Venn diagrams), so if you have a good understanding of that, you won’t need to spend much time on it. I hope that helps, good luck getting everything done in time! 😊
when i was looking at exam questions something came up often, it was "explain why a normal distribution can be used to model X" and the answer would be using the method to find outliers for top and bottom and i'm confused as to why?
Hmm things can be modelled with a normal distribution if the variable is continuous, and if the mean is approximately equal to the mode and the median. I imagine questions then give you further information about the conditions for outliers, and you then apply those conditions with the normal distribution?
Hi Mr Bicen, at 21:40 you put in the calculator, the lower value as 70 and the upper value as 130. The question however says greater than and less than only. I put 71 and 129 in my calculator and got a number that rounds to 95% but the unrounded value was 94.68%. I know it does not make much of a difference as they both round to 95%, but I was just wondering if it was meant to be 71 and 129 instead. Love your videos btw, they are really helpful. Thank you very much for your efforts.
Great question! As this is the normal distribution, the values are continuous, and not discrete (like with binomial). So actually, for greater than 70, we should technically be putting in 70.00000000000001, which is essentially the same as putting in 70. In other words, for the normal distribution, it doesn't matter whether it says < or
Hard to say without looking into in detail, but for stats I'd probably say that binomial/normal distribution are the biggest, and for mechanics it is more evenly spread, guaranteed to be a projectiles question, a moments question, etc.
So probability density is used for continuous variables, much like frequency density is used for continuous distributions (and frequency is used for discrete). I get your confusion with it, it’s not very clear to understand.
@@BicenMaths ohhh so like its the probability per unit of the continuous variable? and thus the area under the pdf (prob. density function) is the probability of that range of the continous variable? sorry if my wordings a bit confusing lol
I’m afraid I don’t have all of these solutions to hand anymore, as these videos were filmed a while back! Anything new that I am creating I am trying to make sure is fully user friendly. This channel was originally just started for my class, didn’t think of others wanting to see it!
Mr Bicen, remember me? I am that girl from two days ago, I knew nothing of alevel Stats and Mechanics two days ago! I just came out of paper 3 and I think if I haven't made too many mistakes, It is going to be an A*. :) What I did in two days was watching all of your statistics videos on 1.75x speed and read through all the PMT mechanic cheat sheets, and did the past paper3s from 2019-2021. Call me the Queen of Cramming! However I did not put any work in for my other exams and I expect my overall grade to be A and I will miss my offer. If only I just put in a little more work....even just a day more, I could of done so much better, *sigh*. If I can get so much done in two days and learn so fast, why didn't I do it earlier and why did I refuse to study for the last three years... Why did I do that to my self?
Any ways, You saved me. After not studying for 3 years, my attention span have deteriorated so much that I could never learn the entire statistics content by reading from the text book, I get distracted too easily, but I did it by watching your videos. It was much needed bcs Alevel Mechanics is quite intruitive and comes naturally without much studying, but Statistics actually requires studying and memorisation. Couldn't have done it without you.
Aint nobody know u lil bro
Also u didnt get an A*
@@shazmeertv44 sure
@@Crazy-bg8px cocaine
@@studywithyan697 what did u get
yaaaaaaahhhhhhhhhhhh
Wayyyyyyyy tom who´d have thought i´d see you here
can I skip learning binomial distribution when learning about normal distribution ? or do I have to know about binomial to help understand normal distribution ? *btw love your videos, they're very useful:)
Binomial and normal are totally separate ideas, so you can learn them separately. But you will eventually need to know both, as they will both be assessed! (There’s also one small area of normal that involves binomial, but only a little bit)
Thank you for answering that quick 😅. I haven’t got enough time to cover everything.Also another qs, in stats I’ve noticed how first three three chapters (data collection,location of measure and representation of data ) all link together (so you kinda have to do the previous one to understand the next ) is that the same with the last three chapters (probability, statistical distribution and hypothesis testing )?
So the the last three chapters are linked, but the strongest links are between 6 and 7 (statistical distributions and hypothesis testing). You literally can’t do Chapter 7 without doing Chapter 6. Chapter 5 supports Chapter 6 slightly, but Chapter 5 is mostly GCSE probability (tree diagrams, Venn diagrams), so if you have a good understanding of that, you won’t need to spend much time on it. I hope that helps, good luck getting everything done in time! 😊
For 17:57 question c) how come u took 0.5+0.34 away from 1 instead of just adding them for the answer to be 0.84
@@millano223 cuz that would be P(X
when i was looking at exam questions something came up often, it was "explain why a normal distribution can be used to model X" and the answer would be using the method to find outliers for top and bottom and i'm confused as to why?
Hmm things can be modelled with a normal distribution if the variable is continuous, and if the mean is approximately equal to the mode and the median. I imagine questions then give you further information about the conditions for outliers, and you then apply those conditions with the normal distribution?
Hi Mr Bicen, at 21:40 you put in the calculator, the lower value as 70 and the upper value as 130. The question however says greater than and less than only. I put 71 and 129 in my calculator and got a number that rounds to 95% but the unrounded value was 94.68%. I know it does not make much of a difference as they both round to 95%, but I was just wondering if it was meant to be 71 and 129 instead. Love your videos btw, they are really helpful. Thank you very much for your efforts.
Great question! As this is the normal distribution, the values are continuous, and not discrete (like with binomial). So actually, for greater than 70, we should technically be putting in 70.00000000000001, which is essentially the same as putting in 70. In other words, for the normal distribution, it doesn't matter whether it says < or
Hi sir which topic do you think are generally worth the most marks for stats + mech?
Hard to say without looking into in detail, but for stats I'd probably say that binomial/normal distribution are the biggest, and for mechanics it is more evenly spread, guaranteed to be a projectiles question, a moments question, etc.
I have a question about discrete distribution and expectation like doyou have any videos on that topic?
This isn’t in Edexcel, so no videos on it I’m afraid!
Thank you
ive searched online and i cant seem to understand what probability density actually is
So probability density is used for continuous variables, much like frequency density is used for continuous distributions (and frequency is used for discrete). I get your confusion with it, it’s not very clear to understand.
@@BicenMaths ohhh so like its the probability per unit of the continuous variable? and thus the area under the pdf (prob. density function) is the probability of that range of the continous variable?
sorry if my wordings a bit confusing lol
Yes that’s exactly it! And so the total area under it will always be 1, as the area represents the probability for that range!
@@BicenMaths thank you
hi, is it possible to upload solutions to the questions you put up at the end of each video onto a google drive document?
I’m afraid I don’t have all of these solutions to hand anymore, as these videos were filmed a while back! Anything new that I am creating I am trying to make sure is fully user friendly. This channel was originally just started for my class, didn’t think of others wanting to see it!
@@BicenMaths no worries, thank you so much! :)
@@poplol126 Hi, i know you probably dont need or want the answers anymore but they are from the Edexcel textbook exercise 3A on solution bank
For stats is there any specific way they expect you to round answers if not specified, like in mechanics
Not really - 4dp for probabilities seems sensible to me!
Wait there's a specific way to round in mechanics? Please elaborate
@Chakamatics it says on the front that answers should be given to 2 or 3 significant figures - unless they ask in terms of g
Oh OK thanks!
@@BicenMaths if they ask in terms of g, then how many sf should we round to sir?
when doing normal distribution on a calculator is there any difference between normal pd and cd?
Always use normal CD - PD is useless for us in A-Level Maths.
Also im 200cm tall sir so ur wrong again
Hi Bicen sir just wanted to correct u and mention that the probability should add up to 200, not 1. You’re welcome :)
how
? what you on about mate