00:01
Hi, i'm david and i'm here to have your answer your question.
00:04
Now let me bring up your question here.
00:06
In this question we discuss about the normal distribution.
00:09
Let me remind you that if we have the x followed by the normal, when the mean equal to when the mean and the sigma is given, and then if we think the x minus the mean over standard deviation, it will follow by the standard normal.
00:24
Now in this question we're given the x it will be the height followed by the normal when the mean equal to the 38 point 72 standard division equal to the 3 .17 and what and what height will 95 % under female be shorter means then what you find a probability that we will have the x here it will be shorter will be smaller than some number i we don't know such that this property equal to the 95 % or equal to 0 .95.
01:07
Another way to do, this one will be proper between the x greater equal to some value and we don't know.
01:12
This will equal to 1 minus 0 .95 and equal to 0105.
01:17
And we need to look at the table on the z table to find the 0105.
01:23
So let me copy the table here for you and i will show you how to use the z table here.
01:28
Now we will have the table here...