The plant manager believes that the operators take a lunch break for more than 60 minutes. A sample of 15 operators from a normal population were randomly selected, and it was found out that their mean lunch break is 60 minutes with a standard deviation of 5 minutes. At 0.05 level of significance, is the mean lunch break greater than 60 minutes?

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Q: Find the area under the standard normal curve between z = 0 and z = 3. 0.4987 0.0010 0.9987

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Q: A sampling distribution (dotplot) for the mean quiz score for a sample n = 30 of STAT101 students is…

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Q: For the following frequency distribution table,

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