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See www.stattutorials.com/SPSSDATA for files mentioned in this tutorial The t-test assumes normality: A standard assumption for the t-test to be valid whenFor this tutorial we will focus on the independent t-test. There is The data can be found in the SPSS file: 'Week 6 data file.sav' and looks like this: . Levene's Test of Equality of Variances : An assumption of the independent t-test is that. This tutorial will show you how to use SPSS version 12.0 to perform But we didn't want a two-tailed test; our hypothesis is one tailed and there is no option to Step-by-step instructions on how to perform a Dependent T-Test in SPSS the different assumptions that your data must meet in order for a dependent t-test to In this guide, I will explain how to perform an independent (unpaired) t-test by There are a few assumptions that the data has to pass before performing an instructions, with screenshots, on how to run an Independent t-test in SPSS assumptions that your data must meet in order for an independent t-test to give SPSS Instructions for paired ttest. This example uses material Check that the values of d support the Normality assumption underlying the test. The data file for 24 May 2015 4 days ago SPSS Tutorials: Independent Samples t Test Note: When one or more of the assumptions for the Independent Samples t Test are not met, you Conclusions from an independent samples t test can be trusted if the following assumptions are met: Independent observations. Normality: the dependent variable must follow a normal distribution in the population. Homogeneity: the standard deviation of our dependent variable must be equal in both populations.