00:01
Yes, so to find the t value using our given sigma and x bar, yes, so we take here x bar, which would be 17 .6, and then minus mu, so minus 20, divided by, in this case, sigma, which is going to be 5 over the square root of n, so over the square root of 25.
00:21
And yes, that was going to work out to give us our t value of negative 2 .4.
00:27
Now to find the corresponding p -value, you would compare the t -value against the t -distribution with n minus 1 degrees of freedom.
00:38
So our degrees of freedom is just going to be n minus 1.
00:41
So that's going to be 25 minus 1, so it's going to be 24.
00:46
And then, so again, you find the corresponding p -value, compare the t -value against the t -distribution with 24 degrees of freedom...