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6. A researcher would like to construct a confidence interval around his sample's mean. a. Which confidence interval would be wider - a 90% confidence

6. 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

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