Box and Whisker Plots - Skewness and Outliers : ExamSolutions Maths Revision
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- čas přidán 14. 07. 2013
- Revision of skewness and outliers in box and whisker plots.
Go to www.examsolutions.net/ for the index, playlists and more maths videos on box and whisker plots, skewness and outliers and other maths topics.
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How are you so good at explaining things, I have my maths exam after two months and I was really worried for it and I wasn't getting anything that my teacher explained in the class, thankyou so much sir.....
Very good video. quite useful. Thank u so much.
Hi. Please explain to me how u got 1.5 as the lower and upper outliers?
Amazing thank you
Thanks!
You and your team are a god send
sir this is perfect
Thank you so much liked and subscribed
Thank you
better at 1.5x speed
1.75x
2.0x
true though 😂😂😂
Better on mute because it’s stats 🤢
Hello ExamSolutions, first of all, thanks for the videos! I just wanted to ask; how do we find the quartiles when the number of values is even?
By adding the both middle value of a particular quartile and then dividing it by 2
Outliers will not occur when the plot is symmetrical, correct?
When will there be more than one outlier on each side? And how would you calculate them?
There need not be more than one outlier on each side. There may be no outliers on either side, or there may be one or more than one outliers on one or both sides.
As regards calculating them, this is explained in the video : All values that are less than Q1-1.5 (Q3-Q1) is a lower outlier, and similarly all values that are greater than Q3+1.5(Q3-Q1) is an upper outlier.
I trust you are familiar with the order of operations and that this helps ?
These are very helpful videos, much appreciated!
Appreciated from my side that you use them.
*sir please make a video on assumed mean*
do they give you an outlier formulae depending on the question or is that the fixed formula for all questions?
It is a fixed formula and it is usually given.
thank you
For median isn't it 16 and not 15? Because 10/2 and that gave be 5th value so I add 15+17 /2 and that's 16?
You don't add 15 and 17, you just count the total number of observations, which is 11, then add 1, so 12, now divide by 2 giving 6, and check the 6th value, which is 15. So 15 is the median.
How do we find the quartiles when the number of values is even?
+Jacob Cass Have you looked at this? www.examsolutions.net/maths-revision/statistics/representing-data/discrete/Q1-Q2-Q3-IQR/tutorial-1.php
I didnt actually, thanks for the heads up!
Hello maths, I'd just like to show my apprecia
better at 2x speed
better when you turn this fucking shit off!!!!!!!!!!!!!!!
i don't understand how you are getting this answer... 12-1.5 x 7 = 1.5????
It sounds like you are doing 12-1.5 which gives 10.5 and then you are multiplying it by 7. It is 1.5x7 which is 10.5 and then this is subtracted from 12. This is basic order of operations.
you have to use the DMAS rule (division first then multiplication then addition then subtraction) so you should multiply first then subtract and you will get 1.5