2. The test (dependent) variable is normally distributed within each of the two populations (as defined by the grouping variable). This is commonly referred to as the . 3. The variances of the test (dependent) variable in the two populations are equal. This is commonly referred to as the...
①选择“Analyze(分析)”—“Compare Means(比较平均值)”—“Independent-Sample T-Test(独立样本t检验)” (图9)。 图9 ②在“Independent-Sample T-Test(独立样本t检验)”对话框中将变量“X”选入右侧“Test Variables(检验变量)”框,...
Step 3:Click “Analyze,” then click “Compare Means,” then click “Independent Sample T Test.” Step 4:Select the dependent variable from the left window paneand then click the top arrow button to move thevariablesover to the Test Variable(s): window. For this example, we are comparing...
This test is used much more often in actual research than the one-sample t test. The X independent variable is dichotomous; it identifies membership in one of two groups, using scores such as 1 versus 2 to identify each person as a member of one group. The Y dependent variable must be...
Obtaining an Independent-SamplestTest This feature requires Statistics Base Edition. From the menus choose: Analyze>Group Comparison - Parametric>Independent-Samples t Test ClickSelect variablesunder theDependent variable(s)section and select one or more quantitative dependent variables. A separatettest is...
A grouping variable defines two groups for the unpaired t-test. The selected grouping variable can be either a numeric or a string variable.Select the desired Bayesian Analysis: Characterize Posterior Distribution: When selected, the Bayesian inference is made from a perspective that is approached ...
The independent t-test, also referred to as an independent-samples t-test, independent-measures t-test or unpaired t-test, is used to determine whether the mean of a dependent variable (e.g., weight, anxiety level, salary, reaction time, etc.) is the same in two unrelated, independent ...
The independent-samples t-test (or independent t-test, for short) compares the means between two unrelated groups on the same continuous, dependent variable. For example, you could use an independent t-test to understand whether first year graduate salaries differed based on gender (i.e., your...
SPSSIndependent-Samplest-TestProcedure Analyze,CompareMeans,Independent-Samplest-Test MoveDVovertoTestVariables MoveIVovertoGroupingVariable EnternumericalvaluesoftheIVunderDefineGroups SPSSIndependent-Samplest-TestSamplePrintout T-Test SPSSIndependent-Samplest-TestPrintout ...
Stored results Description ranksum tests the hypothesis that two independent samples (that is, unmatched data) are from populations with the same distribution by using the Wilcoxon rank-sum test, which is also known as the Mann – Whitney two-sample statistic (Wilcoxon 1945; Mann and Whitney ...