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An engineer wanted to estimate the true mean resistance of a certain electrical circuits (?) by...

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Statistics

An engineer wanted to estimate the true mean resistance of acertain electrical circuits (?) by a sample mean (?̅). It is knownthat the population is normal, and the population standarddeviation is ? = 0.25 ohms. Determine the required sample size (?)so that he will be 90% confident of being correct within ±0.06.

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SolutionGivenThe population standard deviation 025 ohmsConfidence level c 90Margin of Error E 006We have to find the    See Answer
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