00:01
In this session, we want to first find the critical value.
00:05
So because n is smaller than 30, the critical value here is mirro by the tstu instruction, with the blues of freedom equals to the simple size minus in this case.
00:17
And there is the point in the right surface which is an area left to the confidence level that we have plus half of what is up.
00:27
So this is 0 .975.
00:31
Considering this amount of decrease of freedom in this area, they are the data that is to give than 09.
00:38
So this is very critical.
00:41
Then in this, in the square, you should find this area for this sample mean, which is given by the same definition, divide by the square root of the symbol size.
00:51
In our case, it is 4, 1 ,000, divide by the square root of the same amount...