I started this video thinking it would make zero sense but as I kept watching I realised that I finally understood frequency tables 😭 you have saved us all
The class width is only the "number of numbers" in the class when you're dealing with integers. A better way to describe the class width is as the difference of corresponding limits in consecutive classes. In this example, either 30 - 20 or 39 - 29 would give you the class width of 10 (as would 60 - 50 or 49 - 39). This definition works even when your data aren't integers (and has the added bonus of emphasizing the uniformity of the class width across all classes).
He's probably using the 2 k ≥ n rule, where 2 to the power of k is greater or equal to n. k is the amount of classes while n is the amount of observations. So in this case the amount of observations is 30. You find k by seeing which number squared by 2 is greater or equal to 30. So 2 squared by 5 is 32 (greater than 30), which is why the number of classes for this case is 5.
@@geilyfishh You count how many numbers (also known as variables) you see under 'ages of high school teachers' which in this case is 30. Also shown as n = 30, where n equals the amount of observations.
@@mathewdevera7152 If you weren’t taught this rule i would say just guess how many classes you need. But if you want to know more about this rule, then search up 2kn rule classes, on youtube, and a video by mysecretmathtutor should come up. He made me understand this rule so he might help you.
My 6th grade teacher would literally lay down and go to sleep and refuse to teach us and still give us test on the stuff we were EXPOSED to learn and if wasn’t for you I wouldn’t be in 7th
✅ Check out another example here: ruclips.net/video/JgNJmJstYw4/видео.html
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Agree 👍👍😊
Mr. J has been the reason of my decent grades. Deepest gratitudes to you Mr. 😭
You saved my life I sincerely thank you.
Tomorrow exam today watching
That's what am doing now😂😂😂exam in 30 minutes
Mines is do by 10:00 tonight 🤣🤣🤣
😂😂😂
Don’t bring life into this world, you will prevent one possible person from having to do that exam.
@@scouragesij7916 ?
I am a mum, relearning again to help my son. Thank you
This guy is the reason I graduated thank you so much
E
i appreciate the way you break everything down, i was so lost in class and after watching your video i feel confident !!!
I started this video thinking it would make zero sense but as I kept watching I realised that I finally understood frequency tables 😭 you have saved us all
Really appreciate it. My assignment is due tomorrow and you've helped me to complete the assignment
The class width is only the "number of numbers" in the class when you're dealing with integers. A better way to describe the class width is as the difference of corresponding limits in consecutive classes. In this example, either 30 - 20 or 39 - 29 would give you the class width of 10 (as would 60 - 50 or 49 - 39). This definition works even when your data aren't integers (and has the added bonus of emphasizing the uniformity of the class width across all classes).
TYSM FOR THIS TUTORIAL!! tomorrow is my exam day and i barely listen to my math class this is a literal game saver!!
Thank you sir. It helps much for my son ❤
Thank you so much, Mr J this will help my son a lot with math.
Best Explanation!
The way I understood instantly better than my teacher 😍😍😍
Thanks dude!
Dude thanks, ive been failing all my math classes
Same bru
Thanks Mr. Helped a lot!
Thank you ❤
Thank you Sir
This video for what year??
8
5
@@BarevHayerin you don't have to say bad stuff this is a kids channel too
9
12
Mr where di you get the 5
For the class width, you actually round down instead. It’s weird but is true
How were you finding the frequency??
question how did you got 5??/
5 for classes??
@@Godbacked_daughterr huh?
You always suppose 5 ig
cant BELIEVE I learn in 3MIN
Why does 8.4 round up to 9 instead of rounding down to 8 ? It's below 5
Becoz we round up to give an odd number so if we write 8 this will not suit an odd number hence he chose 9 rather than 8
thank you so muh mr.j! all salute goes to you that you make me pass m admission exam i hope you will reply me ill be witing for your reply🥰🥰🥰
It's been four months he's probably busy with the other fire vds😁
Hello there i need this for my exam ty
please, im crying rn. where did you get the five
How he found the number5?
He's probably using the 2 k ≥ n rule, where 2 to the power of k is greater or equal to n.
k is the amount of classes while n is the amount of observations.
So in this case the amount of observations is 30.
You find k by seeing which number squared by 2 is greater or equal to 30.
So 2 squared by 5 is 32 (greater than 30), which is why the number of classes for this case is 5.
So okay, how do you find out the observation exactly?
@@geilyfishh You count how many numbers (also known as variables) you see under 'ages of high school teachers' which in this case is 30. Also shown as n = 30, where n equals the amount of observations.
@@Kim-mp5wg any other way? Im grade 7 and we still havent that rule.
@@mathewdevera7152 If you weren’t taught this rule i would say just guess how many classes you need. But if you want to know more about this rule, then search up 2kn rule classes, on youtube, and a video by mysecretmathtutor should come up. He made me understand this rule so he might help you.
He did a mistake 8.4 rounding up =8 because 5 to 9 is u round up and 1to 4 is to keep the number and remove 4
Good
Sir it is inclusive classes right ?
Very nicely explained
Where did the 5 come from?
Pls what if I did not include the 20 will I start from 21-29or 30
Me watching 5hr before exam😅😅😅😅😅
Bro me too but today
how he get 5 classes (groups)? help
Age group
C.l =1+3.322logN
N is the counting of data
1+3.322log30
Is 5
Hi from Somaliland
What happens if class width has a decimal?
You round it up
Round up to whole number
Cool
Thanks
HOW DID YOU FIND NUMBER 5😢😢
It’s usually given in the problem
Why didn't you add one to the range? Shouldn't it be highest number subtracted from the lowest plus 1?
Nope
U don't add 1 to it
I this one is wrong based on what my instructor teach
But why use ten ...this might get me a zero on this question 😢
8:05
ngl bro sounds a bit like baldi
My 6th grade teacher would literally lay down and go to sleep and refuse to teach us and still give us test on the stuff we were EXPOSED to learn and if wasn’t for you I wouldn’t be in 7th
Yesss
60-69
Exam in next 40 minutes
worst teach ever
Na it is just you he is goated
womp womp lil bro
🥱
First
he sounds like baldi
To much bakzas
Thank you ❤
Pls what if I did not include the 20 will I start from 21-29or 30