00:03
N1 is equal to 35, x1 bar is equal to 15 .89, s1 is equal to 5 .90, n2 is equal to 36, x2 bar is equal to 12 .31, and s2 is equal to 5 .48.
00:23
Then, null hypothesis h0 is, muar is equal to mu p, whereas alternative hypothesis h1 is, muar, not equal to mu b.
00:36
And the statistic t is equal to x1 bar minus x2 bar divided by root over s1 square by n1 plus s2 square by n2, which is equal to 15 .89 minus 12 .31 divided by root over 5 .9 square divided by 35 plus 5 .48 square divided by 36.
01:06
This is equal to 2 .647.
01:13
Now we have degrees of freedom is equal to n1 plus n2 minus 2.
01:18
This is equal to 69.
01:21
We have alpha is equal to 0 .05.
01:24
We need to find the critical values.
01:26
Critical values has found by using excel.
01:30
Since it is a two tail test we have use t e .0 i .m .a comment to find the critical values.
01:35
He has 0 .05 gaza alpha value and 6090 degrees of freedom.
01:41
Critical values are plus or minus 1 .99.
01:46
Therefore the rejection reason is less than minus 1 .9 and t greater than plus 1 .9...