The one-way within-groups ANOVA is the multiple-group equivalent of a paired-samples t test.

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This statement is true. Both the one-way within-groups ANOVA and paired-samples t test are used to analyze data from related groups, where each participant is tested more than once under different conditions. However, the one-way within-groups ANOVA is used when analyzing data from three or more related groups, while the paired-samples t test is used for only two related groups.

The One-Way Within-Groups ANOVA Is the Multiple-Group Equivalent of a Paired-Samples