00:01
So in this case, we are trying to check if the mean the population is smaller than the nationalized value, which is 120.
00:12
We have 40 observations, and sample mean equals to 115, and that's sigma in the standard of population equals to 150.
00:24
And after they performed this claim here, after they tested this claim, they found that the test statistic is, in this case, i can even put the letter z, is minus 3 .16.
00:39
So what we need to do is compute the p value.
00:41
So the p value here, because our claim has the last sign, the p value should also test the less sign, the probability.
00:50
Less than the value of the test statistic.
00:54
So if you compute this using a z table, you're going to find that this is quite small, 0 .008, which means the base on the p value, we can conclude that the p value here is less.
01:12
It is the last option from what we have in the question.
01:15
So this is here is the right statement...