The confidence interval for the difference μ1 - μ2 is based on the same approach used in the case of one sample: Point Estimate ± Standard Error.
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Q11: We convert the estimate Q12: 2) multiplied by either zα/2 or tα/2,df Q13: A common case of dependent sampling is Q14: The difference between the two sample means Q15: A left-tailed test determines whether μ1 is Q17: If the underlying populations cannot be assumed Q18: There is only one type of matched-pairs Q19: We always deal with matched-pairs sampling if Q20: The margin of error in the confidence Q21: Assume the competing hypotheses take the following
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