00:01
There is given a normal distribution for this question and the mean value, so the mean, which is denoted by mu, that is given as this is 98 .1 fahrenheit.
00:13
And the standard deviation, standard deviation, which is denoted by sigma, that is given as 0 .5 fahrenheit.
00:22
Great.
00:23
So we are going to use the 689599 .7 rule, so which is also called as the empirical rule.
00:30
So what this empirical rule says, let me just recall you.
00:35
If you have a normal distribution, something like this one, let's say this is the mean value.
00:43
If you go away one standard division from the mean score, we have two identical regions.
00:49
This is 34 % and this is 34%.
00:52
If you go away two standard division from the mean score, this area has the area of 13 .5 and also the same thing for mu minus 2.
01:02
Standard deviation.
01:04
Great.
01:05
If we just go away three standard deviation from the mean score, which is 2 .35%, and this one is also a minus three standard division, 2 .35%.
01:15
Let me just put numbers...