Sir respectfully I hope after Thursday I never have to hear your voice again and think about maths again, but right now you are a godsend and have literally solved all my problems with statistics in one long statistic binge watching
I actually really love this comment - please do not read this comment in my voice. Read it in the voice of someone you actually like right now. Hahaha GOOD LUCK! Wow, I would be sick of me after that many videos too. Hope it pays off, I know that it will! :)
For question 1d, could you please explain why you didn't also consider the coded time 0 < x < 5, because surely this would also be under 35 mins (true value)?
4:43 Hi sir, I checked the mark scheme for part e and it says the data is "skewed". How? I know you told us to skip it but I wanted extra exam questions practice. Thank you in advanced.
How do you know how much to round by when the question doesn’t say? Is there a correct amount to round by like for example in mechanics if you use 9.8 you should round to 2sf
We might prefer to use the median as this tells us what the typical/middle student got, and we might prefer the IQR as it concentrates on the middle 50%. The mean and standard deviation both take all students into account, which means that outliers can have a bigger influence on them. This doesn't mean that median/IQR are better, just different, and this is a reason why we might prefer them.
Data that has lots of 'extreme' values, or ones that are considered outliers (like the ones in the 46-60 group) will greatly affect the mean and standard deviation, as these calculations take all values into account. So median and IQR might be better as they don't consider these extremes.
Sure - they are all found in my Bicen Maths Google Drive, and filed according to the module in “Blank Lesson Notes”. The link is on my About section and I’ll also include it here: drive.google.com/drive/folders/1uUbx_lRLLE9O4WnI8TS77dUOJw_DjljV
Best Alevel maths videos on youtube, Thank you!!!
Thank you 🙏🏼
The Sxx part was never explained to me and i was so confused when doing questions on the textbook. Thank you for bringing it up 🙏🙏🙏
Sir respectfully I hope after Thursday I never have to hear your voice again and think about maths again, but right now you are a godsend and have literally solved all my problems with statistics in one long statistic binge watching
I actually really love this comment - please do not read this comment in my voice. Read it in the voice of someone you actually like right now. Hahaha GOOD LUCK! Wow, I would be sick of me after that many videos too. Hope it pays off, I know that it will! :)
could you please show what would be the answer to part e on the question about students completing an exam
For question 1d, could you please explain why you didn't also consider the coded time 0 < x < 5, because surely this would also be under 35 mins (true value)?
I took those into account, as I was considering 18, not 15! 18 represented the 3 from 0 to 5 and the 15 from 5 to 10 :)
Could you please give the answer for question e in example 2. (Explain why the mean and standard deviation are not appropriate)
It’s do with the skew of the data, which isn’t in the A-Level anymore, so don’t worry about it! 👍🏼
Hello Sir, What is the onscreen calculator app you are using ? The one that pops on top on good notes. Thanks in advance 😊
That’s NCalc fx! It’s paid for but worth it. You can minimise it so it is easy to slide in and out!
It’s called NCalc fx - it is paid for but worth it!
4:43 Hi sir, I checked the mark scheme for part e and it says the data is "skewed". How? I know you told us to skip it but I wanted extra exam questions practice. Thank you in advanced.
Skewed data used to be on the specification, but it has now been removed. Skewed data is data that is not symmetrical!
@@BicenMaths Thank you sir
How do you get your mean and standard deviation in calculator in 1st question
How do you know how much to round by when the question doesn’t say? Is there a correct amount to round by like for example in mechanics if you use 9.8 you should round to 2sf
Not really - I usually think 3sf is a good rule of thumb, and for probability 4dp
Hi, why is 12:47 t because it is the true value. Like how do I know if it is the x or the t
T is the true times, x is the coded times that the human resources manager created!
What would the answer to q1 e) be?
We might prefer to use the median as this tells us what the typical/middle student got, and we might prefer the IQR as it concentrates on the middle 50%. The mean and standard deviation both take all students into account, which means that outliers can have a bigger influence on them. This doesn't mean that median/IQR are better, just different, and this is a reason why we might prefer them.
@@BicenMaths Thank you so much sir!
3:34 how would we do part e????
Data that has lots of 'extreme' values, or ones that are considered outliers (like the ones in the 46-60 group) will greatly affect the mean and standard deviation, as these calculations take all values into account. So median and IQR might be better as they don't consider these extremes.
@@BicenMaths thank you!!!!!!!!!!!!
hi can you can provide the pdf file you are working on
Sure - they are all found in my Bicen Maths Google Drive, and filed according to the module in “Blank Lesson Notes”. The link is on my About section and I’ll also include it here: drive.google.com/drive/folders/1uUbx_lRLLE9O4WnI8TS77dUOJw_DjljV
@@BicenMaths Thank you so much 😊
At 7:37 could you not just put it in the calculator to find the median
You could, but it says use linear interpolation, so they’re looking for evidence of this technique!
9:40