If a confidence interval for the difference between a pair of treatment means includes 0,then we reject the null hypothesis that there is no difference in the pair of treatment means.

Question

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If the confidence interval for the difference between a pair of treatment means includes 0, it means that the difference between the means is not statistically significant at the given level of confidence. This does not necessarily mean that we reject the null hypothesis. The decision to reject or fail to reject the null hypothesis depends on the level of significance and the p-value calculated from the t-test or other statistical methods.

If a Confidence Interval for the Difference Between a Pair