Question: Question 11 (6 points) Listen A junior engineer has to build a sample mean chart for the machines making Oreo cookies. He knows from numerous

Question 11 (6 points) Listen A junior engineer
Question 11 (6 points) Listen A junior engineer has to build a sample mean chart for the machines making Oreo cookies. He knows from numerous previous samples that this service life of the cream injectors is normally distributed with a mean of 760 hours and a standard deviation of 41.5 hours. In the last three weeks, he tested the service life on random samples of four production runs with these results: Sample Hours 1 725 760 771 782 2. 800 773 751 748 3 751 772 751 772 What is the value of ? keep one decimal place) Your Answers

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