Question: Question 11 (6 points) A design engineer wants to construct a sample mean chart for controlling the service life of a halogen headlamp his company

Question 11 (6 points) A design engineer wants to construct a sample mean chart for controlling the service life of a halogen headlamp his company produces. He knows from numerous previous samples that this service life is normally distributed with a mean of 760 hours and a standard deviation of 41.5 hours. On three recent production batches, he tested service life on random samples of four headlamps with these results: Sample Hours 1 740 760 777 788 2. 799 779 755 746 3 776 770 767 755 What is the sample mean service life for sample 3? (Keep one decimal place) Your

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