00:01
Hi, i'm david and i'm here to have 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 high participating.
00:10
Here we'll test the mean will not equal to the 1 ,400 and this will be the 2 -touth test.
00:19
Now we have the 4 part, abcd, and in each part we need to find the test statistics and we need to find the b value and also we need to find the make the decision.
00:34
So we will have here we have the proportion standard division sigma equal to the 413.
00:42
Now in the first part a we will have the x bar equal to 1 ,500.
00:50
So therefore we have the test z equal to the x bar will minus the mean over sigma divided square to the n then we have the 1 500 minus the mean will be the 1 ,400 a sigma will be the 430 aversquered to the n and if we compute it we will have 130 limit the 420 equals to the 2 .44 and from here we can find the b value p value equal to the probability under z that greater than the 2 .44 but because of the due tel test we have to multiply by 2 and compute and computation use the normal distribution here this one will be the 2 144 get 2 times 0 1 07 3 4 and then we have the 2 10 010 07 3 4 equal to the 0147 47 and this one will compare with the unfa which is 10 % in is more than the 0 .1 therefore we will come to the conclusion that will return the new hypothesis.
02:07
Similarly for the question b we will have again find the test statistics and it will equal to the z.
02:17
Let me use a different color here...