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In the design of an automobile radiator an engineer has a choice of using either a brass-copper alloy casting or a plastic molding. Either material provides the same service. However, the brass-copper alloy casting weighs 25 pounds, compared with 20 pounds for the plastic molding.Every pound of extra weight in the automobile has been assigned a penalty of $6 to account for increased fuel consumption during the life cycle of the car. The brass-copper alloy casting costs $3.35 per pound, whereas the plastic molding costs $7.40 per pound. Machining costs per casting are $6.00 for the brass-copper alloy. Which material should the engineer select, and what is the difference in unit costs? Show work.
a simple random sample of n 300 full-time employees is selected from a company list containing the names of all n 5000
The Minitab output for the Tukey Least Significant Difference multiple comparisons is below. Which means are different and similar
Test this conjecture with formal hypothesis test, by using a 5% significance level. Find out the p-value for hypothesis test.
the data from an independent-measures research study produce a sample mean difference of 6 points and an estimated
the u.s. post office is interested in estimating the mean weight of packages shipped using the overnight service. they
The random variables, X and Y, have a probability density function given by: By transformation of variables, find the probability density function of Z=X+Y.
A recent survey by the insurance company showed the following probabilities for the number of bedrooms in each insured home. Find the standard deviation for the distribution.
The average expenditure on Valentine's Day was expected to be $100.89 (USA Today,| February 13, 2006). Do male and female consumers differ in the amounts they spend?
What is the probability that a randomly selected mango weighs less than 14 ounces?
The accuracy of the scanner price of each. Let x represent the number of the five items that is priced incorrectly. Use the information in the FTC study to estimate p for the binomial experiment.
why is it important that a sample be random? for its validity all hypothesis testing depends heavily on the assumption
An airline tracks data on its flight arrivals. Over the past six months, 65 flights on one route arrived early, 273 arrived on time, 218 were late, and 44 were cancelled.
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