00:01
From given information, let's create the following table.
00:08
The first row is the pulse rates of females and the classes are 60 to 69, 70 to 79, 80 to 89, 90 to 99, 100 to 109, 110 to 119, 120 to 129.
00:41
Then we have the frequency denoted by f.
00:48
Next column is the midpoint denoted by x.
00:54
Then we have f multiplied by x.
00:58
Then we have x minus mu whole square.
01:05
So in this case, the frequencies are 12, 14, 11, 1, 1, 0, 1.
01:16
The midpoints are 64 .5, 74 .5, 84 .5, 94 .5, 104 .5, 111, 114 .5, 111, 124 .5.
01:38
Fx, the value gives us 774, 1043, 929 .5, 94 .5, 104 .5, 0, 124 .5.
01:57
And x minus mu is equal to, whole square is equal to 150 .0625...