Although the original data for a repeated-measures study consist of two scores for each participant,the calculation of the mean and variance are done with only one score for each participant.

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For a repeated-measures study, the mean and variance calculations are done with one score for each participant, but that score is calculated as the average of the two scores for that participant. Therefore, the original data of two scores per participant are used to derive a single score for statistical analysis.

Although the Original Data for a Repeated-Measures Study Consist of Two