Mathematics, 10.03.2020 17:01 casianogabriel2004
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 500 hours and a standard deviation of 20 hours. On three recent production batches, he tested service life on random samples of four headlamps, with these results:.Sample Service Life (hours) 1 495 500 505 500 2 525 515 505 515 3 470 480 460 470 What is the sample mean service life for sample 2?A) 460 hoursB) 495 hoursC) 500 hoursD) 515 hoursE) 525 hours
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Mathematics, 22.06.2019 02:30
Which number completes the system of linear inequalities represented by the graph? y > 2x – 2 and x + 4y >
Answers: 1
A design engineer wants to construct a sample mean chart for controlling the service life of a halog...
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