00:01
For this exercise, we are given data with corresponding weights.
00:05
So in this table, i've put the data in the first row and the corresponding weights in the second row.
00:12
Now, the table didn't come out on the web page.
00:16
So i may have reversed these, in which case you'll just have to modify the solution accordingly.
00:23
And also just make sure that i have all of the right numbers in the table as well.
00:32
Now for part a we are asked to compute the weighted mean.
00:38
And the way we do this is we take each data point, multiply it by its weight, and then add up the four resulting terms, and then divide by the sum of the weights.
00:56
So it looks like this.
01:24
So for this specific data we have 3 .6 times 6 plus 3 .0 times 3 .3.
01:37
And so on...