00:01
Hi, i'm david and i'm here to have 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 hypothesis testing.
00:10
Here i want to test the evidence to indicate that the publisher mean is less than the at.
00:17
And we will have the known hypothesis that the mean equal to the at versus the alternative hypothesis that the mean will be less than the at.
00:28
And notice that this is the left tell test.
00:32
Here we're given the symbol size n equal to the 25.
00:36
The sum of mean xx equal to the 77.
00:39
And we have the s equal to the 10.
00:42
So the first step we need to find the test statistics denoted by the t.
00:48
The formula will be the x bar minus the mean over s divided by square into the n.
00:53
Then we have the 77 minus mean will be 80...