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two 95% mean confidence intervals indicate a difference between means at the alpha = .05 level...

two 95% mean confidence intervals indicate a difference between means at the alpha = .05 level when?

a. the endpoints do not touch

b. the endpoints just barely overlap

c. the endpoints overlap by about 25% of their range

D. we cannot use a single mean confidence intervals to determine differences

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Answer #1

To observe the difference between population means at any level of significance you should calculate the confidence interval

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