00:01
After this question, the heights of a group of professional basketball players are summarized in a frequency distribution.
00:06
Find the mean height.
00:08
So to find the mean height of a frequency distribution, we need first multiply the number values by the frequencies, find the totals, and then divide the total by the number by the total frequency.
00:20
So essentially, we need to find, in our case, the midpoint, so it'll be 70 .5 times two.
00:32
At least a midpoint method for this case, plus 72 .5 times 7, plus 74 .5 times 8, plus 76 .5 times 10, plus 78 .5 times 10, plus 80 .5 times 4, plus 82 .5 times 1.
00:59
And you divide all of this by the sum, it's 2 plus 7, plus 8, plus 10, plus 10, plus 4 plus 1...