00:01
It is given in the question that the percentage of data values that must be within one, two, and three standard deviation of the mean, that have a bell shape.
00:12
So first of all, the bell shape is the normal distribution.
00:17
This is called the bell shaped here.
00:19
And here is the mean value.
00:23
So if i just add one standard deviation and subtract one standard deviation for a mean, i will get this interoperable.
00:30
Here and we know that the interval of this one, the area of this region, is 34%.
00:37
This is also symmetrical, so this is also 34%.
00:41
If i just go away two standard deviation from the mean score, and if i just subtract again two standard division here, that is 13 .5%, and this one is also 13 .5%...