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Confidence Interval for a population mean - σ known

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Joshua Emmanuel

This video shows how to construct confidence intervals for a population mean, assuming the population standard deviation (sigma) is known. z formula used.

00:00 Intro
00:30 Margin of Error
00:57 Critical Value
01:50 Example
03:13 90% confidence interval
03:56 98% confidence interval

posted by Synesisj6

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