1st Quartile of a Grouped Frequency Distributions

Рет қаралды 141,246

7 жыл бұрын

This short video details the steps to follow in order to calculate the 1st Quartile value of a Grouped Frequency Distribution

Пікірлер: 75

@katekate7622 Жыл бұрын

I wish I can like this twice. Thanks for making this so simple. I don't know why teachers enjoy shrouding and complicating things.

@ephraimyarnap7375 4 ай бұрын

This was really helpful in preparing for my exam this weekend

@irshadem804 4 жыл бұрын

millions of thanks..every steps explained clearly & great accent..keep it up prof!❤️👍

@MathsAndStats 4 жыл бұрын

Thanks, Irshad. It would be great if you could share. Regards. Jonathan.

@shivanshbisht2564 3 жыл бұрын

A really helpful explanation. Thank you so much!

@beannesantos2321 6 жыл бұрын

this is very helpful. since it was confusing to understand with my teachers.

@juliustresor9172 5 жыл бұрын

hey man. got exam tomorrow and you saved me with this video. thanks. i really appreciate it. and love the accent man, its enjoyable. God Bless you

@MathsAndStats 5 жыл бұрын

Hi Julius. That's great to hear and I'm glad it was of help. It would be great if you could share with your classmates. Thanks, Jonathan.

@nawabpoya 7 жыл бұрын

Millions of Thanks

@tmm4633 6 жыл бұрын

Trying to tutor my little cousin, did this ages ago. Thanks so much. Your accent is also quite enjoyable to listen to.

@MathsAndStats 6 жыл бұрын

Thanks TM. The accent might be because I am Irish, but maybe not. :-) Thanks for watching. Jonathan

@silvereyed6241 6 жыл бұрын

This is actually very helpful, my research class is not much of a help in this(stats) the formula given to us was very confusing.I got my homework correct, the first try with this video

@MathsAndStats 6 жыл бұрын

That's great news Silver. Please share. Regards Jonathan.

@mohammadasnawidalidig7770 6 жыл бұрын

Very much appreciated.

@bhardwazsaswot8141 4 жыл бұрын

Thank u bro its very help full..

@karanjha7117 2 жыл бұрын

Excellent explanation

@mckinleyjohnduran2013 6 жыл бұрын

Thank you very much sir!

@deepaliadlakha8634 3 жыл бұрын

Thankyou, it was helpful 🙏

@nihalattar7132 7 жыл бұрын

thanks it really help me

@Kaythebe 5 жыл бұрын

Thank you so much.

@bonafideshapange3016 3 жыл бұрын

very good, thumbs up!!!

@emsu_ 5 жыл бұрын

Thank u so much!! i learned it very well now im the one teaching my friends LOL

@MathsAndStats 5 жыл бұрын

Well, thank's great news. Please share. Regards. Jonathan.

@jessicaevangelista8024 5 жыл бұрын

Thank you so much 😚

@chikaodiliobi4198 4 жыл бұрын

Where do you classify boundary numbers like 18, 31, 44?

@arashi9719 3 жыл бұрын

Thank you

@eternyte688 4 жыл бұрын

shouldnt we subtract the lower bound with 0.5

@xuanyidu3259 3 жыл бұрын

thanks!

@shankaradevapriya9686 5 жыл бұрын

Thanks

@puneetohri6256 5 жыл бұрын

your accent is unsettling me , but i like what you taught , thanks !! cheers !!

@a.rrehman8288 4 жыл бұрын

how he arranged the data into columns.....i couldn't find the earlier video ...?please help me to find it

@MathsAndStats 4 жыл бұрын

Hi. Here is a link to the video: kzfaq.info/get/bejne/nbyiZciKy8mYpp8.html Regards. Jonathan

@osaabd390 5 жыл бұрын

hello Jonathan, thank you for this video. let us assume that the 1st quartile falls in the first class. what would be the cumulative frequency of the class FQ1-1? Thanks

@MathsAndStats 5 жыл бұрын

Hi 0SakA, The quick answer is that the cumulative frequency before the quartile class would be zero. The reason is that there is a class before your first class - it just happens to have no observations in it - that is a frequency of zero. As such any cumulative frequencies would be zero too. I hope this helps. Regards. Jonathan.

@osaabd390 5 жыл бұрын

@@MathsAndStats Yes, this helps a lot and makes sense. Thank you very much for the answer and making such a great video! Regardless of what others might say, NOTHING is more enjoyable than the Irish accent! All the best!

@faithndinda2134 4 жыл бұрын

@@MathsAndStats Thank you very much for this... It's exactly what I was looking for and your explanation is very clear.

@SleevesYT 5 жыл бұрын

Arent you going to minus the lower boundary with 0.5?

@jacintamukoko1046 4 жыл бұрын

Its adding the lower boundary and the preceding upper boundary then you divide by two since they are equal no adding or subtracting any value

@weiliang7810 4 жыл бұрын

Would Q1 still be 18-31 if another class 83-102 was added (meaning that there is a now an odd total number of classes instead of an even total number of classes)?

@MathsAndStats 4 жыл бұрын

Hi Wei. It depends on the actual frequency of observations associated with that class. The more observations there are in your new interval, the more likely the first quartile Q1will move into the following interval. Remember, quartiles are all about how many observations there are and not on their values. I hope this helps and please share :-) Regards. Jonathan

@hamidiqbal8539 6 жыл бұрын

Thanks Sir

@MathsAndStats 6 жыл бұрын

No problem Hamid. i am glad it was helpful. Jonathan.

@maryjoycecrujedo4382 4 жыл бұрын

There is an overlapping in interval

@renzpatos7205 4 жыл бұрын

Love the accent man

@MSR1 4 жыл бұрын

Cant say 13😂😂😂

@francheskafarr4841 5 жыл бұрын

how to allow advertisements on your video hehe?

@helpme8684 6 жыл бұрын

I really don't know much about this sort of stuff, but is it possible for your 1st quartile, if rounded off, not be in the first quartile class? or is it impossible? Still, thanks for the video I learned a lot from it.

@MathsAndStats 6 жыл бұрын

Hi Miles, Why don't you respond with the Grouped Frequency Distribution that you are using for your calculation and i will check. Jonathan

@helpme8684 6 жыл бұрын

Thanks for responding, Sadly I didn't use anything, I just want to know if its possible to have that kind of event to occur.

@MathsAndStats 6 жыл бұрын

Ok Miles, let me try to answer your question then. If you consider the Quartile formula there are two parts to it - the first being the lower bound of the quartile class + a fractional amount of the class width. This fractional amount of the class width can only take on values between 0 and 1 (inclusive) and so the quartiles in their extreme cases can be either the lower bound or the upper bound of your class. So to answer your question - no - the quartile has to fall in the quartile class you identified (by definition the quartile class) but could reside at its extremities. I hope this helps. Kindest regards. Jonathan

@somethingtofinish 6 жыл бұрын

Why would the width of the class be 13 instead of 14?

@MathsAndStats 6 жыл бұрын

Hi Anissa, the distance between two numbers is defined to be there difference (x - y). Therefore, the distance between 5 and 18 is 18 - 5 = 13. Maybe if you count how many steps you need to take from position 5 through to 18 you will see the concept a little clearer. I hope this helps. Jonathan

@ansarshafiq5857 3 жыл бұрын

What if estimated value (sigma(f)/N ) is equal to class frequency ? For example : 56/4=14 ??

@MathsAndStats 3 жыл бұрын

You choose the first cumulative frequency (F) that exceeds 14. So with 56/4 = 14 equaling a cumulative frequency, you don't choose that, instead you choose the next one.

@weng09224635566 5 жыл бұрын

Thank you!!

@salifali4499 4 жыл бұрын

7:32 anyone observed the Cq1 = 13.... But i count to 14,, Please correct me if i am wrong.

@aimanmartiall 5 жыл бұрын

I still don't understand why he choose the 2nd class instead of the 1st class? Shouldn't the value of 13 got from the q1 belongs to the 1st class? Please help me. Tq

@MathsAndStats 5 жыл бұрын

Hi Hazim. There are only 4 observations in the first class so the first quartile value could not possibly reside in that class. The first quartile value is the 13th observation. This must be in the second class as there are 10 observations in that class, and cumulatively there are 14. Regards. Jonathan

@aimanmartiall 5 жыл бұрын

@@MathsAndStats ohh ya I really didn't realize about that. Thank you very much, Jonathan.

@by.seulgi2535 6 жыл бұрын

Thank you very much for this it's really a great help😢😢😢💕 PS.Potamasmagalingpatomagturokesasateacher namin🤐

@okay3724 6 жыл бұрын

My bae IRENE pareho lang tayo bes hahaha

@SleevesYT 5 жыл бұрын

Amen tayo diyan

@darindeguzman1278 7 жыл бұрын

can you please explain that Fq1-1 should be 14 but it becomes 4?

@MathsAndStats 7 жыл бұрын

Hi Dalyn. Yes, of course I can. The key thing to remember is that 'Fq1-1' is a single value the '-1' is not telling us to substract 1. What it tells us is ' the cumulative frequency of the class before the quartile class.' You are correct 14 is the cumulative frequency of the quartile class, but we require the one before it, which is 4. I hope this is somewhat helpful. Jonathan

@darindeguzman1278 7 жыл бұрын

thank you so much. it helped a lot.