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The cycle times for an electroplating machine are believed to be normally distributed. Twenty-one ...

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The cycle times for an electroplating machine are believed to be normally distributed. Twenty-one ...

The cycle times for an electroplating machine are believed to be normally distributed. Twenty-one plating operations are randomly sampled, and cycle times are recorded. The sample average cycle time is 10.21 min, with a standard deviation of 0.59 min. What is a 95% confidence interval for the mean cycle time on this machine?

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(9.958, 10.462)

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(9.941, 10.479)

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(8.979, 11.441)

▸

(9.911, 10.509)

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Introductory Statistics: A Problem-Solving Approach

Edition: 3^rd

Author: Kokoska

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