00:01
Hi, i'm david and i'm here to help you and see your question.
00:03
Now let me bring up your question here.
00:06
In the question here we are going to discuss about the hyperst testing.
00:10
Here we are given the known hypothesis with the mean equal to the 120 versus the alternative hypothesis mean will be not equal to the 120.
00:21
Notice that this one will be the 2 -tel test and then we're given the sigma, the n and the unfar.
00:29
With the unfa, we will have the critical value.
00:32
It will equal to plus and minus z of the unfaugh of a 2.
00:36
It will equal to plus and minus z of the unfat over 2.
00:42
It will look at the zee table.
00:44
This one, it will equal to the 2 .33.
00:48
And on the other hand, we have the test statistics.
00:51
It will be denoted by the z.
00:54
The formula will be the x bar minus the mean of sigma divan be squared at the n.
00:58
And x bar here we don't know yet, we will minus the mean will be the 120 over the sigma will be the 32 over square to the 49.
01:13
And this one, it will simplify again the x bar minus 120 over the 32 divided by the 7.
01:23
It will equal to the 4 .571.
01:27
And we will have the rejection rule that we will reject the null hypothesis if we have the z test it will be smaller than the minus 2 .3 or we have the z test could be greater than the 2 .33...