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Several factors are involved in the creation of a confidence interval. Among them are the sample size, the level of confidence, and the margin of
Several factors are involved in the creation of a confidence interval. Among them are the sample size, the level of confidence, and the margin of error. Which statements are true?
(a) For a given sample size, higher confidence means a smaller margin of error.
(b) For a specified confidence level, larger samples provide smaller margins of error.
(c) For a fixed margin of error, larger samples provide greater confidence.
(d) For a given confidence level, halving the margin of error requires a sample twice as large.
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