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Compaq Computer Corporation has an assembly plant in Houston, where the company's Deskpro computer is built. Engineers at the plant are considering a new production facility and are interested in going online with the new facility if and only if they can be fairly sure that the variance of the number of computers assembled per day using the new facility is lower than the production variance of the old system.
A random sample of 40 production days using the old production method gives a sample variance of 1,288; and a random sample of 15 production days using the proposed new method gives a sample variance of 1,112. Conduct the appropriate test at α = 0.05.
use the fact that the standard normal distribution integrates to 1 to evaluate the following integral. i.e. useintegral
If measurements are made over span of 9 months, and results are averaged, find out the probability that neighbourhood is considered unsafe?
-describe the study's purpose (hypothesis or research question explored) -Describe the type of research conducted (experimental, correlational, quasi-experimental, etc.)
write a 1050- to 1750-word paper describing a hypothesis test to perform on that data using a one or two-sample z test
Test Interviews Of two personnel evaluation techniques available, the first requires a two-hour test-interview while the second can be completed in less than an hour. The scores for each of the eight individuals who took both tests are given in t..
suppose a manufacturing company makes a certain item. the time to produce each item is normally distributed around a
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How many pages should the manufacturer advertise for each cartridge if it wants to be correct 90 percent of the time?
a population has a mean u72 and a standard deviation o25. find the mean and standard deviation of a sampling
Use these data to create a data-based CDF for the distribution of weights for lab animals. Estimate the probability that an animal's weight will be less than 9.5 grams.
Construct separate relative frequency histograms for the survival times of both thetherapies. Compare the two histograms. Does the new therapy appear to generate a longer survival time? Explain your answer.
The counts in the five groups are 113, 95, 108, 99, and 85, respectively. The probabilities for these five intervals are all the same. What is this probability?
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