How to Calculate Interquartile Range ? | What are Quartiles and InterQuartile Range (IQR) ?
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- čas přidán 25. 08. 2024
- Hi Friends,
In this video, we will find out what are Quartiles and how to calculate the Inter Quartile Range of a data set.
This is Priya and Welcome to "Enjoy Math".
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Priya.
common terms-
what are quartiles, what is inter quartile range, what is iqr, what is inter-quartile range, how to find out quartiles, how to find out inter quartile range,what is the lower quartile, what is q1, what is the middle quartile, what is q2, what is median,what is upper quartile, what is q3, formula for iqr, formula for inter quartile range,
#interquartilerange
#iqr
#quartiles
#statistics
good and easy
explanation
simply superb
Thank you so much for the wonderful comment... really happy to be of help!! 😊😊👍👍
Thank you ma'am ❤❤❤
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It was helpful
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Thank you, ma'am! It was helpful.❤🎉
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Very helpful video and clearly explained 👍👍
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Simply understood..... Thank you.... 🥰
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Thanks very well explained
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Thanks
Examination is near and you tell me 😢
Thank you very much.
Most welcome!! All the very best for your exams!! I am sure you will do very well 👍👍👍👍
Very well explained ma'am🙏
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@@EnjoyMath Ma'am your simple English speaking is so fluent that every one can understand it.I teach children and I think your teaching will help me enhance my mathematical concept and fluency in English.
@@sanjitkumarbiswal155 Thank you so much sir for the encouragement!!Keeps me motivated!! Really nice to know that you too are in teaching profession, my best wishes to you 👍👍👍
Thank you mam, so well explained.
Love youhh❤
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Awesome explanation
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So nice..tq mam
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nice explained mam
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Nice 👍❤
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Well explain ❤
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Thank you mam
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Mam in quartile 3 why you take 3x2 = 6 term and why quartile 62 please explain
Here n=7
Therefore, q3= 3(n+1)/4 th position
q3= 3*8/4=3*2=6 th position
Now we have to arrange the observations in ascending order..then we see that the observation at the 6th position is 62.
Pls let me know if you have any questions...
Thankyou!!!
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Very well explained 👏 👌
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Saw the videos in your channel, very informative videos on English ,great going 👍👍👏👏👏
@@EnjoyMath thank you mam.
mam ur voice is very awesome ...i really like it 😘
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Excellent explanation👍
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you're most welcome maam... keep teaching💗@@EnjoyMath
if term number obtained is in decimals, then what to do?
For example if the term number is 2.5, then you take the mean of 2nd and 3rd terms ..that will be the q1 value....
Pls let me know if you have any questions...
@@EnjoyMath Thankyou ma'am :)
Most welcome 😊😊
Mam agar Q1 koi floating term aaya jaise ki 2.5th term to vo kaise find kare ?
Agar decimal number aata hai ....for example if it is 2.5, then you take the mean of 2nd and 3rd terms ..that will be the q1 value....
Pls let me know if you have any questions...
@@EnjoyMath ok. Mam thanks
Welcome 👍👍
what if the series will be even?
If n is even, as mentioned in the video, the lower quartile or q1= (n/4)th term, and the upper quartile=(3n/4)th term.
Pls let me know if you have any questions...
@@EnjoyMath iska ap alg se btaen mera exam 2 din m ,even series kha har step samjhaen k wahan q1 ,q2,q3 kse nikalen
@@universal-dx2gz
Agar n= 8 then aapko n/4 and 3n/4 integer milenge, tab koi Problem Nahi hoga.
suppose data is
2,4,5,7,10,15
N=6
Q1= N/4 th observation= 6/4= 1.5
So it is midway between 1st and 2nd observation
Q1= obs1 + 0.5(obs2-obs1)
Q1=2+0.5*(4-2) =2+0.5*2=2+1=3
Q2=n/2 th observation=6/2=3rd obs
Q2=5
Q3= 3n/4 th observation = 3*6/4= 4.5
So it is midway between 4th and 5th observation
Q3= obs4 + 0.5( obs5-obs4)
Q3= 7+0.5(10-7) = 7+0.5*3=8.5
Pls let me know if you have any questions....
Thank You from Bangladesh! Very well explained!
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how to find co efficient
@@naveedahmad9337 which coefficient?
@@EnjoyMath coefficient of quartile deviation
@@naveedahmad9337 coefficient of quartile deviation = (Q3-Q1) /(Q3+Q1)
@@naveedahmad9337 coefficient of quartile deviation = (Q3-Q1) /(Q3+Q1)
What will be the answer
2 times of range = _____ times of IQR
2
3
4
5
Which option I need to select ??
Hello, it's a really interesting question!! I verified with couple of different data sets, 2 times of range is approximately 2.6 times of IQR....so probably it should be 3 times,pls let me know if you have any questions
@@EnjoyMath are you sure. ??
I think it should be 2 .
Maybe I am wrong
Do verify it with a couple of examples .....I got 2.6 that way....
You may be right...but if
2 x range = 2x IQR
Then the 2 on both sides of equal sign will get cancelled and we get,
Range= IQR, which is usually not the case....
@@EnjoyMath thanks for your reply
@@EnjoyMath when the number the term com whith comma 2,5 what shoud be do ?
If n value is 10 how will we calculate Q1 by this formula
Q1=1/4×n.it comes in decimal
In case q1 comes as decimal....for example if it is 2.5, then you take the mean of 2nd and 3rd terms ..that will be the q1 value....
Pls let me know if you have any questions...
@@EnjoyMath thank u so much💖
Most welcome!! 👍👍😊😊
when N/4 will be used???
Suppose we have marks of 100 students and n/4 th data is 20 ,then it means the first 25 percentile of students have got marks lesser than or equal to 20. It tells us how well the students of that grade have performed in comparison to another class. Suppose in another class, n/4 th data is 14, it means the first 25 percentile of students have got marks lesser than or equal to 14...so it gives us a measure of comparison...pls let me know if you have any questions...
no no my question is
when we use N/4
and when we will use (N+1)/4 ?
Oh ok ....we use n/4 when n is even,and (n+1)/4 when n is odd..... pls let me know if you have any doubts...
@@EnjoyMathquestion about the same ,,,,,,,(n+1)/4,and n/4,,,,,,,so my problem is I don't know what u mean when u say odd and even pls elaborate ......
@@janetkambua5399 n means total number of observations in the given data set. If it is odd,we use one method, if it's Even,we use the other method... Is ur doubt resolved? Pls let me know