Please help me

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    I need your help for quasi-experimental study and analysis  so Please reply me for below noted questions.


    1. Can  t -test for control and experimental groups ( Non-equivalent quasi-experimental ) for pretest data  and t-test for post test data sufficient to show the effectiveness of the implemented program? Because levene’s test shows violation of assumption for univariate analysis of the data.


    2. Is it fine if one uses Welsh’s t-test though normality assumption violated? The groups are not same in size.


    Please let me know.


    Your response is highly appreciable.



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