00:01
Hi, i'm david and i'm here to help you answer your question.
00:03
Now let me bring up your question here.
00:05
In the question here, we are going to discuss about the normal distribution.
00:09
Let me remind you that if we have the x that follows by the normal, with the mean and the standard deviation, it will turn the x minus the mean of a standard deviation, we obtain the standard normal.
00:21
Here we have the height of the 30 g's x, it will follow by the normal, when the mean equal to the 110, standard division equal to the 10.
00:31
And in the question a we need to find the probability that the height it will be more than 120.
00:39
To find this probability i need to convert the x into the z by using this formula.
00:44
Then we will have the probability of the 120 will minus the mean, divided by the standard deviation.
00:52
Then we can equal to the probability the z greater than 2...