00:01
There is given a normal distribution for this question.
00:03
Let me just take notes what's given here.
00:05
So the mean denoted by mu.
00:07
This is 150.
00:09
And the standard deviation was also given here, which is denoted by sigma.
00:14
And that was given as 28 pounds.
00:17
So what we have to do? so for part a.
00:20
But before part a, i can define the random variable x for this normal distribution.
00:23
This is 150 and 28 here.
00:26
So for part a, we need to get the random variable x, which is less than or equal to 185.
00:34
To get this probability, i'm going to use the graphing this relay calculator application normal cdf.
00:38
There is no lower boundary put for a very small number.
00:41
The upper boundary is 185.
00:43
And the mean is 150 and the standard division 28.
00:46
Let me just get the answer.
00:48
Just press second variance in the normal cdf, lower boundary...