00:01
So here i'm going to note that the results will vary depending on what table you're using.
00:09
Basically, we'll see why i say that.
00:12
So we have that the number of degrees of freedom...
00:16
Okay, actually, let me back up one second here.
00:17
We're told we have alpha equals 0 .05, and we're doing a two -tailed test.
00:24
So that means that the critical value that we want, t star, will be plus or minus the t statistic for n1 plus n2 minus two degrees of freedom and a one -tailed proportion of 0 .025.
00:42
So we have that the number of degrees of freedom, df here, should be 47.
00:51
So if i use my software to find this exactly, inverse cdf, student t distribution, 47 degrees degrees of freedom, 0 .025 in one tail, you'd say that it's plus or minus 2 .01, roughly, or 2 .012...