Question: A production process is checked periodically by a quality control inspector. The inspector selects simple random samples of 25 finished products and computes the sample

A production process is checked periodically by a quality control inspector. The inspector selects simple random samples of 25 finished products and computes the sample mean product weights, xx. Suppose test results over a long period of time show that 10% of the xx values are over 3.2kg and 10% are under 2.8kg. The mean of the population of products produced with this process is ( ), and the standard deviation is ( ).

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