Angie5045 Angie5045

11-09-2019
Social Studies

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What happens to the confidence interval when the confidence level is changed from 95% to 90%? ‍ A. The margin of error decreases and the interval becomes narrower.‍ B. There is no change.‍ C. The margin of error increases and the interval widens. ‍

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mairiamasad7331 mairiamasad7331

11-09-2019

Answer:

A 90% Confidence Interval would be narrower than a 95% Confidence Interval. This occurs because the as the precision of the confidence interval increases (i.e. CI width decreasing), the reliability of an interval containing the actual mean decreases (less of a range to possibly cover the mean).

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