00:01
There is given a normal distribution for this question.
00:03
Let me take note the given value.
00:05
So the mean, the population mean is denoted by mu.
00:08
That was given as 10 here.
00:10
And the standard division is also given here, which is denoted by sigma.
00:15
And that was given as 2.
00:17
Let me define a random variable x here.
00:19
So i can define random variable x, which is normally distributed.
00:22
The mean is 10 and the standard division is 2.
00:25
So in the first part of the question, we have to find the random variable x, which exceeds 13 milliamperes.
00:34
So the x is greater than 13.
00:35
To get this probability, i'm going to use the graphing display calculator application, normalcdf, lower boundary 13.
00:42
There is no upper boundary, put a very big number.
00:44
That means standard power 99.
00:46
And the mean of this distribution and the standard division...