00:01
Hello, welcome to this lesson.
00:02
In this lesson, we have this data and you've been asked to create frequency distribution, frequency table with four classes.
00:17
All right, so this is what we'll do.
00:30
So these classes, then the frequency, then the midpoint, the midpoint of the class.
01:04
So the midpoint, we have the accumulative frequency okay and we have the total also here so the classes you will start from 26 to 30 that's the first class then the second one we have 31 to 35 then we have a 36 to 40 and now we have 41 to 45 okay, so we'll work out with the midpoint first.
02:37
The midpoint we add 26 to 30.
02:40
That is 56, we divide by 2.
02:44
That is 28 here.
02:47
The next one, we have 31 as a lower bound plus 35.
02:55
That is 66.
02:56
We divide by 2.
02:58
We have 33 here.
03:01
Then that's when we have 36 plus 40.
03:04
Just 7 to 6 divided by 2 we have 38 here and the last one we have 41 plus 45 just 86 divided by 2 is 43 okay so the total should be here looking at it so now we would want to see the number that falls between 26 6 to 30.
03:55
So this is what i would do.
03:56
I would select all the values and order them in ascending order.
04:07
So i'll order these ones in ascending order.
04:11
I'll go to the home.
04:16
I'll use the sorting ascending order.
04:19
So here i see that one.
04:29
Let me use that look.
04:32
See that one, two, three, four, five.
04:37
6, 7, 8.
04:41
This will be 8 for the 26 to 30.
04:51
Now from 31 to 35, i'll have 1, 2, 3, 4, 5, 6, 7, 8, 9, 10.
05:10
Okay, so i'll have 10 for this.
05:13
And now from 36 to 40, i would have 1, 2, 3, 4, 5, 6, 7, 8.
05:38
So i have 8 for that as well.
05:43
So this is 8.
05:46
And finally, from 41 to 45, i have 1, 2, 3, 4.
05:55
I have four for that.
05:59
All right...