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Scores on the Beck Depression Inventory (BDI) were obtained from 71 participants before and after a 10 week treatment for depression. The mean and variance

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Scores on the Beck Depression Inventory (BDI) were obtained from 71 participants before and after a 10 week treatment for depression. The mean and variance of the difference scores are 6.656 and 10.911, respectively. Please report the lower limit of the 90% confidence interval around the mean difference

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