The One-Sample T Test procedure tests whether the mean of a single variable differs from a specified constant and automates the t-test effect size computation. Introduction. The t-test procedure performs t-tests for one sample, two samples and paired observations. The independent samples t-test compares the difference in the means from the two groups to a given value (usually 0). The Independent-Samples T Test window opens where you will specify the variables to be used in the analysis. The procedure for the one-tailed test is the same as for the two-tailed test. It should be close to zero if the populations means are equal. To run an Independent Samples t Test in SPSS, click Analyze > Compare Means > Independent-Samples T Test. Median weekly earnings for those with the highest levels of educational attainment doctoral and professional degrees were more than triple those with the lowest level, less than a high school diploma. A one-sample t-test is a statistical procedure used to determine if there is a significant difference between the sample mean and a known or estimated population mean. The mean is the difference between the sample means. Use one-sample t-test with SPSS to check wether the sample mean and hypothesis mean is statistically different. The Paired Samples t Test compares the means of two measurements taken from the same individual, object, or related units. The need to conduct a one-sample t-test is much less frequent than the need to conduct a two-sample t-test. This tutorial will show you how to use SPSS version 12.0 to perform one-sample t-tests, independent samples t-tests, and paired samples t-tests.. 2 SPSS Assignment 4: One-Sample t-test Hypotheses: Is the average salary at a corporation's local branch substantially different from its national average salary?. There are two issues here, though. Steps to do the one sample student’s t-test in SPSS: Analyze >> Compare means >> One sample t-test >> Put the hypothesis value >> OK SPSS reports the mean and standard deviation of the difference scores for each pair of variables. First is to have an idea of which direction you want the t-statistic to go. Using SPSS for t Tests. SPSS has no specific procedure or dialog box to run a one-tailed test for differences of means. We demonstrate how to run a one-sample t-test, including how to specify the test value for the parameter under the null hypothesis. Paired Samples T-Test Output. These "paired" measurements can represent things like: A measurement taken at two different times (e.g., pre-test and post-test score with an intervention administered between the two time points) One sample t test in SPSS is explained here. The last one -Paired Samples Test- shows the actual test results. Fortunately, I have created a guide for performing a one-sample t-test in SPSS. What is a one-sample t-test test? SPSS creates 3 output tables when running the test. For that reason, it is easy to forget how to perform a one-sample t-test. ; It is used to determine whether the sample is generated from a specific mean. As always, if you have any questions, please email… The one sample t-test is used to compare the sample mean with the given population mean (a given value). Assumptions of a one-sample t-test. All of the variables in … The single-sample t-test compares the mean of the sample to a given number (which you supply). Especially, it is used in small sample case and unknown variance. This tutorial assumes that you have: Downloaded the standard class data set (click on the link and save the data file) ; Started SPSS (click on Start | Programs | SPSS for Windows | SPSS 12.0 for Windows) Examples A researcher might want to test whether the average IQ score for a group of students differs from 100. ##Into to Statistics## SPSSFollow for more SPSS and statistics videos..