A Researcher Is Estimating the Average Difference Between Two Population

question 18

Multiple Choice

A researcher is estimating the average difference between two population means based on matched-pairs samples.She gathers data on each pair in the study resulting in: Assume that the data are normally distributed in the population.To obtain a 95% confidence interval, the table t value would be ___.

• A)2.132
• B)1.86
• C)2.306
• D)2.976
• E)2.776

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