00:01
M0 is equal to 28 parts per billion and n is equal to 36 x bar it is nothing but 32 .6 and s it is given to be smallest it is given to be 21 .9 where that ppm represents the paths per million.
00:43
So here, sigma is an unknown concept.
00:47
Sigma, we doesn't know, since s alone it is given, sigma is an unknown concept, we are going to use the t test.
00:57
We are going to use the t test.
01:00
Let us fix the hypothesis that, null hypothesis to be h -0b, mu -0 is equal to mu -0, which is equal to 20.
01:11
Mue is equal to mu not which is equal to 28 and h1 to be the alternative hypothesis h1 to be m greater than 28 that is it can be considered to be a right tailed test or a one tailed test either it might be a right tail test or one tailed test now the critical value will be critical value will be for alpha as equal to 0 .06.
01:48
Alpha point 06.
01:49
So in the table concept t table we are going to find out in terms of t of n minus 1 degrees corresponding to the alpha value which is nothing but t of 36 n it is given to be 36 minus 1 comma alpha value we have a to be 0 .06.
02:14
So which is nothing but t at 35 comma 0 .6.
02:20
So the corresponding table value it is nothing but 1 .594...