Mathematics, 10.06.2020 01:57 minecraftpro64p7t123
An HP laser printer is advertised to print text documents at a speed of 18 ppm (pages per minute). The manufacturer tells you that the printing speed is actually a Normal random variable with a mean of 17.35 ppm and a standard deviation of 3.25 ppm. Suppose that you draw a random sample of 10 printers.
Required:
a. Using the information about the distribution of the printing speeds given by the manufacturer, find the probability that the mean printing speed of the sample is greater than 17.55 ppm.
b. Use normal approximation to find the probability that more than 48.6% of the sampled printers operate at the advertised speed (i. e. the printing speed is equal to or greater than 18 ppm)
Answers: 3
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An HP laser printer is advertised to print text documents at a speed of 18 ppm (pages per minute). T...
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