0:00
So have a look on the question.
00:01
So here we are talking about 68, 95 and 99 .7 % rule.
00:05
This is the graph representing all the values from 45 to 75.
00:09
Mu is mean and sigma is standard deviation.
00:12
Now here, the rule states that, rule states that, first, the first point here is 68 % of the distribution, of the distribution, falls under or falls within mu minus sigma to mu plus sigma.
00:43
Then we have second point, 95%, all the statements are same, of the distribution falls within mu minus two sigma and mu plus two sigma.
00:59
Then we have last statement, third one, that is 99 .7 % of the distribution falls within mu minus three sigma and mu plus three sigma.
01:14
This is the meaning of the rule, 68, 95, 99 .7%.
01:20
So here we can see that in this case, we have, we can see that the value of mu is this one.
01:26
So we can see mu is equal to 60 and mu minus sigma is equal to 55...