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The manufacturer of a laser printer reports the mean number of pages a cartridge will print before it needs replacing is 12,250. The distribution of pages printed per cartridge closely follows the normal probability distribution and the standard deviation is 770 pages. The manufacturer wants to provide guidelines to potential customers as to how long they can expect a cartridge to last.
How many pages should the manufacturer advertise for each cartridge if it wants to be correct 95 percent of the time? (Round z value to 2 decimal places. Round your answer to the nearest whole number.)
Is global F ratio significant? Identify this F ratio, and describe whether it is important.Is coefficient for X1 (productivity) significant? How do you know? Mention its t value and accompanying P-value.
a poker hand consists of 5 cards chosen randomly from a standard 52 card deck.a find the chance that you are dealt a
To determine whether a metal lathe that produces machine bearing is properly adjusted, a random sample of 36 bearings is collected and the diameter of each is measured.
suppose that the annual rate of return for a common biotechnology stock is normally distributed with a mean of 5 and a
a survey reported that 70 of those responding to a national survey of college freshmen were interested in taking summer
According to the empirical rule, if the data from a "bell-shaped" normal distribution ______ percent of the observation will be contained between 2 standard deviations below the mean and 2 standard deviations above the mean.
a system consists of 4 identical components where at least 3 components need to work for the system to work. each
describe the role and importance of listening skills in cross-cultural communication. how can these skills be learned
Find the Normalization constant, N, (b) the expectation value of the observables , (c) σo, and (d) the probability of finding the eigen value
Following are speeds of 40 cars clocked by radar on a particular road in a 35-mph zone on a particular afternoon; Make (a) a frequency table, (b) a histogram, and (c) a frequency polygon. Then describe the general shape of the distribution.
In order to test the assumption of a Poisson distribution, a random sample of 150 ten-minute intervals was taken.
The listeners do not know which is playing, and the order has been determined randomly. Each person is asked to state which of the two performances he or she prefers. What statistical test is most appropriate here? Why?
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