Mathematics, 11.06.2020 22:57 selfiegymnast
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 when this service life is in control it 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 mean of the sampling distribution of sample means when the service life is in control
Answers: 2
Mathematics, 20.06.2019 18:04
You will get 25 points an image of a rectangular prism is shown below: part a: a cross section of the prism is cut with a plane parallel to the base. what is the name of the shape created by the cross section? explain your answer. (5 points) part b: if a cross section of the prism is cut perpendicular to the base, what would be the shape of the resulting cross section? explain your answer. (5 points)
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The figure shows the front side of a metal desk in the shape of a trapezoid. what is the area of this trapezoid? 10 ft²16 ft²32 ft²61 ft²
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Mathematics, 22.06.2019 00:30
Julie begins counting backwards from 1000 by 2’s and at the same time tony begins counting forward from 100 by 3’s. if they count at the same rate, what number will they say at the same time?
Answers: 1
A design engineer wants to construct a sample mean chart for controlling the service life of a halog...
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