00:01
For these type of questions, the first thing that you have to do, you need it, if there are some small number of numbers here, you can just write all the numbers orderly from smallest, the greatest one.
00:17
So the numbers are 52 and 56, so i can write them.
00:22
This is 58 and then 63 and 65, this is 75, this is 72, 74, 74.
00:30
And 75, 76, 79, 80.
00:35
This is 84, 86, 88, and then 90, 92, 92, 95, and there are two 99s.
00:48
Great.
00:49
So we just write all the numbers here.
00:52
So the first thing is we have to just make the frequency table here.
00:56
Let's say the interval, the clause.
00:59
So we have to get the first class as this is 50 and 59.
01:03
So the next one would be, this is 60 and 69.
01:07
And the next one is 70 and 79.
01:10
This is 80 and 89.
01:12
So the last number we have 99.
01:13
That means the last class would be 90 and 99.
01:17
What about the frequency here? let me just count the number of items in the interval.
01:23
So between 50 and 59, how many numbers do we have? we have one, two, three, three numbers.
01:28
Between 60 and 69, 1, 2, 3, sorry, just two numbers here.
01:36
And 779, 1, 2, 3, 4, 5.
01:39
5 numbers we have, and 1, 2, 3, 4, 4 numbers for 80s, and 1, 2, 3, 4, 5, 6, 6 numbers.
01:48
Let me just add these frequencies and just check, are there 20 numbers or not? this is 5, 10, 14, 16, and 20.
01:57
Great.
01:58
So we have 20 numbers here.
01:59
So the next step of the question, what we have to do? and we need to just draw the histogram.
02:07
So for the histogram, let's say this is, by the way, the part a.
02:11
For the histogram, we need the x and y axis here.
02:15
So let's say this is the frequency axis, and this is the class axis here.
02:21
So we just start with, let's say this is 50, 60, 70, 80, 90, 90, 90, and 99.
02:33
So between 50 and 60, the frequency is three.
02:36
That means we have to just draw a column, something like this one here.
02:42
And between 60 -69, there are two values here.
02:46
So this is the frequency here.
02:49
I mean, this is the column here.
02:50
And what about 70 -79? there are five numbers here.
02:54
That would be something like this one here.
02:58
So there are five numbers...