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What can he do to make the interval width smaller

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Reference no: EM133266029

A researcher would like to construct a confidence interval around his sample's mean.

a. Which confidence interval would be wider - a 90% confidence interval or a 95% confidence interval? (This part of the question will be on Blackboard as a true/false question.) *Explain why.

b. The researcher decides to construct a 95% confidence interval. What can he do to make the interval's width smaller?

Reference no: EM133266029

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