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has collected some data regarding spare time of workers in minutes from a sample of 23 workers. The average spare time is 58 minutes with

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has collected some data regarding spare time of workers in minutes from a sample of 23 workers. The average spare time is 58 minutes with the sample standard deviation of 7 minutes. Construct the 98% confidence interval of spare time in the factory. (4 marks) The sample size n=

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