Which confidence interval is wider, Mathematics

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Which confidence interval is wider

The random sample of 46 200-meter swims has the mean time of 3.948 minutes and the standard deviation of 0.080 minutes. The 95% confidence interval for population mean time is (3.929,3.967).

Create 95% confidence interval for population mean time using the standard deviation of 0.05 minutes. Which confidence interval is wider? Describe.

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