Did you consult Levin (1999), as instructed? On Mon, 12 Oct 2003, Bin wrote:
> I found the following formula > ************ > Let E be the experimental condition and let C be the control > condition. Let m be the means, s the standard deviations, and n be > the sample size. Then > t = (mE - mC) / SQRT[(s2E + s2C) / n ] > for the case of equal sample sizes, n, in both groups. > See Levin (1999: 25) for the formula when sample sizes differ. ^^^^^^^^^^^^^^^^^^^^ > ************ > in my case, the sample sizes is different, But I can not find the > formula. Could you please tell me the formula for t-Test of Difference > of Means with different sapmle sizes? > > Thanks. ----------------------------------------------------------------------- Donald F. Burrill [EMAIL PROTECTED] 56 Sebbins Pond Drive, Bedford, NH 03110 (603) 626-0816 . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
