Calculating the mean of a histogram
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- čas přidán 25. 08. 2024
- The process used to find the mean of a set of data in which the values are labeled as intervals. This video only specifically applies to equal class width histograms. This is Not a type of Frequency Density histogram. If you are looking for that type of calculation I have another video for that. I repeat this is not a video that covers a frequency density histogram.
Over complicated it could of just said multiply the middle of each class interval by the frequency and then divide that number by all the frequencies added up
isn't that what he did though?
@Monik
yes he did but it took him 9 minutes 3 seconds to explain it
Thanks mate
@@Rowse1994 some of us like having it explained to us
@@Shank5terand some don’t 😂
THANK you. Teachers never explain how to actually DO math anymore.
they still dont :/
My man good at teaching, pay respects.
The y-axis on a histogram is frequency-density, so the tallest bar is not necessarily the one with the most ones. (A very wide bar with the largest frequency would look shorter than a thin bar with not that many, even though more people were in the shorter bar)
When using univariate data, that is separated into equal class widths. It is not necessary to create a frequency density histogram. Yes I know when you do your studies many times teachers will focus on Frequency Density histograms, however, the reason for that is it allows for better comparison to other data sets. This is not what this video aimed at, this I a basic 7th grade Algebra I histogram. I made this video specifically for my students who were prepping for our state exam that could potentially require them to calculate the mean of a univariate data histogram of equal class width. The important part of this video is that my class widths are all equal. If my class widths were not equal then you would be correct that I must label the Vertical axis Frequency Density.
Thank you so much man this helped so much, I’ve been so bad at averages on histograms and this helped me ace all the work in histograms
Thank you so much, now i could pass my exam!! cuz teachers never really explain how to calculate anymore ;-;
Isn't the y-axis supposed to be frequency density, not frequency
The answer is dependent on how you determine your class intervals. Here is a site you can look to see that there are three different ways to group your classes and the y-axis is labeled based upon those. newonlinecourses.science.psu.edu/stat414/node/120/
“quick video”
the nine minute video 👁👄👁
Absolute 🐐 helped me on big test thx
Great video! Thanks for your help.
thank you so much for this video
cheers minger
🤣
thank you very much for this video. it helped me a lot! you explain it very good, thank you!!
Glad it helped!
Thank you!
Cheers Mate
Thank you! :)
That was so cool.
Thank you really helped clarify the fuzzier areas needed clear !!
THE ONE ON THE SIDE FREQUENCY DENSITY NOT THE FREQUENCY
Phoebe Cotes You do not label a histogram as frequency density when you have class-widths of equal length. I will relinquish to you the fact that in higher level statistics courses that yes a “true” histogram should technically be the frequency density. However it is not an absolute requirement to do so when the intervals are of equivalent length. So the video and all of its mathematical processes are correct and labeling the y-axis as frequency is not technically wrong. The concept of frequency density is important but as stated in the video this is a basic level problem. So there is no need to talk about density for this level of problem
@@dminger1 But if the class widths are equal lengths then showing it in a histogram is pointless
Thank u sir
Thank you
why isn't the mode 39. isn't the mode the greatest number minus the smallest number, which is 46-7?
The Range is the greatest minus the smallest. The mode is defined as the most frequently occurring value.
this really helped - thanks!
Oh hunny. My heart goes out to you. I’m in year 10, have zero formal maths qualifications, and know that in a histogram, they y-axis is frequency DENSITY. That’s literally the entire point of a histogram. Please, don’t quit your day job.
I don’t plan on it. However, you are sadly mistaken if you think that there is only one type of histogram and no others. Here is some literature to help you with your qualifications. newonlinecourses.science.psu.edu/stat414/node/120/.
Imagine being this ignorant lmao
Isn’t the y axis frequency density
Only if you want a density histogram. There three types of histograms. The purpose of a histogram is mainly to show continuous data. The three types are a frequency histogram, a relative frequency histogram, and a density histogram. It depends on how you wish to represent the data.
thiss helps
Very helpful, thank you.
I feel like this could of been explained in half the time 🤔
How would u determine the size of an individual class.
For example find the size of the 2nd class
45-59 with a frequency of 30
If the second class has a data range of 45-59, what you do is subtract the two numbers 59-45= 14, however, class sizes must include all applicable numbers in the class so what we do is add 1 to the value so the second class has a class width of 15. Based on your question about size of the actual class the frequency of the individual class is just extra information in the problem intended to confuse you from the question at hand. On the other hand, if you meant that you have a total sample size of 30 data pieces that span from value in 45-59. Then that is something different.
@@dminger1 thanks for the help
thank you so much
this helped me a lot thank you !!
I like how your trying, but this make completely no sense.
THANK YOU......
This makes so much sense thanks
4:48 for the actual method.
Here is a link to a better video that has all the times associated with it. Also is more in depth explanation. czcams.com/video/-haVXyCHMSs/video.html. Thanks for watching
Thanks, overexplained but keep it up.
This actually helped a lot 👍
Wait but that’s not a histogram, that’s a bar graph.
Yes and no,
I know it’s not a common statistical histogram but there are different versions of histograms if you want the real deal histogram video I have one on my channel
this guy waffles
you are a god
Your teaching style is not understandable
Mean, median and mode are measures of center. The average is the mean (arithmatic mean)
2:3
Same
W
You must love the sound of your own voice. You really are good at taking information that could be told in 1 minute and stretching into a pointless nine minute video.
I don’t but when I was teaching 6th graders, they needed more explanation as they didn’t have enough life experiences to understand topics. So video May just not be relevant to you. Hope you have a good day
@@dminger1 SHIIIIT mate, now I feel like an arse. Sorry for being a dick. I was angry cause I needed a quick answer, shouldn't have taken it out on you. The explanation was good because I understood it after watching. cheers.
Really helpfull
Great video, thanks.
Chris X glad it was helpful. Thanks for watching
HISTAGRAMS DONT ALWAYS HAVE THE SAME CLASS WIDTH
So when I said this was a very basic intro video. That’s what I meant. I know that they do not. This is as a basic of a histogram as it gets
Thank you so much!
minger
thanks
@odetteochs
Bro too much talking just get straight to the point from the beginning
minging
A bit unnecessary to keep it this long. If you're talking about mean why are you talking about what the mode is?
Dude he only took 30 seconds just to explain what the mode was, be grateful he even mentioned it.
just get to the bloody point
That’s not the frequency
Why is this video 9 minutes long? You're just talking on about nothing important
ever looked at your video, yourself?
u r just talking plenty
Argeed
Sir, I believe you have misspelled Agreed. Are you proficient in spelling? jk jk lol
nice try but failure. i will subscribe because i feel sorry 4 u