Question: QUESTION 6 A design engineer wants to construct a sample mean chart for the service life on a new lightbulb. Previous samples revealed that the

QUESTION 6 A design engineer wants to construct a sample mean chart for the service life on a new lightbulb. Previous samples revealed that the service life was normally distributed with a mean of 500 hours and a standard deviation of 20 hours. On the recent production batches, service life on random samples of three headlights were: Sample 1 2 Service Life 496 515 489 512 501 497 496 503 503 503 499 506 What is the sample mean of the 2nd sample? 500 0 505 499 O 508

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