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Dear All I have two groups named Middle Managers (MM) and Top Managers (TM) and I want to test whether the mean differences between the two are significant or not. My issue is that Group 1 (MM) has 150 respondents (10 respondents from one organization each) while Group 2 (TM) has 15 respondents (One response from each organization- Because Top Managers are fewer in numbers in a given organization) I plan to use T-test for testing the significance but am worried about the disparity between sample size of the two groups...The data has already been collected...Do I need to increase the sample size? Would welcome any advice/suggestions in this regard... -- Dr. Bilal Mustafa Khan Assistant Professor Department of Business Administration Aligarh Muslim University (AMU) India 0091-9897310838