00:01
Hi, i'm david and i'm here to help you and send your question.
00:03
In the question here, we are going to discuss about the high -partice testing.
00:06
Here, i see you answer the question exactly about the noon hypothesis mu -1 minus -muteu greater equal to the 0 versus the alternative hypothesis mu -1 minus mu -2 smaller than 0.
00:21
Here we're given the data summary from the tempa and the last, so let me begin up here.
00:27
Here because we see the s1 and s2 there very close each other.
00:33
So we'll assume equal variance.
00:40
And then we'll have to find the sb square, the boon variance, then equal to n1 square n1 minus 1, times with the s1 square plus n2 minus 1 times with the s2 square divided by the n1 plus and 2 minus 2.
00:58
Now we'll click in the value, we will have the...
01:03
The 39 times under 9 800 square plus 49 times in the 980 square divided by the 88 and then again i would get equal i would turn the square root so to get this one will be i want to compute this boon standard deviation then we get equal to the 9855 point 81 so from here we can find the test statistics.
01:38
The formula will be the t equal to the x bar 1 minus the x bar 2, the divanement the sp, and then times on the square of the n1 plus 1 over n2.
01:51
And if we compute, we get equal to times square root under 140 plus 1 over the 50.
02:01
And then we will have the 50.
02:06
53 ,500 minus 58 ,300 divided by the answer.
02:15
Then again equal to the minus 2 .2 .96...