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# Margin of error using the critical values from the

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Unformatted text preview: 6 1.960 2.5% 1.645 -1.645 2.5% -1.960 -2.576 2% z Confidence Interval Interpretation Remember that a given confidence interval is actually only one of many that can be used as an interval estimate for a population proportion. The level of confidence is the proportion of such intervals that actually contain the population proportion. © 2011 THE CARNEGIE FOUNDATION FOR THE ADVANCEMENT OF TEACHING A PATHWAY THROUGH STATISTICS, VERSION 1.6, STATWAY™  ­ STUDENT HANDOUT STATWAY STUDENT HANDOUT | 5 Lesson 8.1.1 Intervals for a Population Proportion and the Normal Distribution When we interpret a given confidence interval, we can say that the level of confidence is the proportion of similarly constructed intervals that contain the population proportion, or that it describes how confident we are that the population proportion is in the interval. Margin of...
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