00:01
So i'm going to note that i'm lacking the original data for the problem, but i was able to find an upload of a similar problem to another site.
00:08
So i'll go with what i can see from that.
00:11
The problem itself, or what you're asked to do, is the same.
00:15
It's just i can't guarantee that the data is the same.
00:19
But either way, hopefully this will help with knowing how you're supposed to approach this.
00:23
So we're given a table of values where we have the ages of resonance, the midpoints, and the frequency.
00:32
We're asked first to fill in the midpoints where the ages of the residents, for instance, we go 60 to 67, 68 to 75, 76 to 83, and 84 to 91.
00:47
To find the midpoints, we just take the average of the end points.
00:51
So 60, let's see here.
00:55
60 plus 67 is 127.
00:57
Divide that by 2 to get the average of those two values.
01:00
So our first midpoint is 63 .5.
01:03
Then similarly, 68 plus 75 divided by 2, the result of 71 .5.
01:14
And one thing that we should be able to see here is that, well, the midpoints have the same, whoops, not 71 .4, pardon me, 71 .5.
01:21
The distance between each midpoint is the same as the distance from the lower bound of one bin to the next.
01:28
So we just need to add eight each time.
01:31
So our next midpoint is going to be 79 .5.
01:35
And then our final midpoint is going to be at 87 .5.
01:42
Then, let's see here, in terms of the frequencies, we have, for the data that i have here, 17, 24, 8, and 4.
01:54
And the way that we want to do this to find the mean value, well, actually, what we want to do here first, is additionally find the relative frequency for each bin.
02:08
So we have that you can find the total by summing up all of the frequencies first...