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Data from a sample of 300 Atlanta residents were used to construct a 95% confidence interval to estimate the mean commute time (in minutes). That
Data from a sample of 300 Atlanta residents were used to construct a 95% confidence interval to estimate the mean commute time (in minutes). That 95% confidence interval was [26.735, 31.257].
How would this confidence interval change if a 99% confidence level were used? Assume that the same sample data were used.
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It would be narrower
It would be wider
Its width would not change
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