00:01
This problem wants us to approximate the mean, and we're given a list of frequencies for data class limits.
00:06
And the way we find the approximate mean here is by looking at the midpoint for all of our intervals, and then taking the midpoint for each of our intervals and multiplying by the accompanying frequency.
00:18
So for our first interval, 30 to 34, the midpoint there would be 32, and 1 times 32 gives us 32.
00:24
And we're going to find all of these multiplication values and then add all of our values up after we multiply by the midpoint so that's now 37 for the midpoint here times 3 and 37 times 3 gives us 111 next we have a midpoint of 42 and 8 times 42 gives us 336 then we have a midpoint of 47 and 12 times 47 gives us 564.
00:50
Next we have a midpoint of 52 and 20 times 52 gives us 1040.
00:56
Next we have a midpoint of 57 so that's 11 times 57 which gives us 627.
01:02
Next we have a midpoint of 62 so that's 7 times 62 to give us 434...