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By measuring the amount of time it takes a component of a product to move from one workstation to the next, an engineer has estimated that the standard deviation is 3.92 seconds.
Answer each of the following (show all work):
(A) How many measurements should be made in order to be 90% certain that the maximum error of estimation will not exceed 2.0 seconds?
(B) What sample size is required for a maximum error of 1.5 seconds?
Analysis of variance (ANOVA) is used to determine if there is a difference between the means of different populations. This is an example from a student in Prescott Arizona.
The Appliance Center sells a variety of electronics equipments and home appliances. For last four years the following quarterly sales (in $ millions) were recorded.
would this prove that they are exceeding their goal, using α = .025?
It seems that simulation could handle any situation or study. But is that always true? Discuss instances in which a simulation would be important and useful, and then a situation in which a simulation would not be appropriate.
Determine the expected market return on $ 20,000 if the expected return on asset is 20%, its beta is 1.5, and the risk free rate is 5 percent?
You are dealt 2 cards successively without replacement from a shuffled deck of 52 cards. Find the probability that the first card is a king and the second card is a queen.
A sample of 19 albino Hungarian banded aardvarks was examined for nose length. Since this is a small sample, how various degrees of freedom will be used to find the t-score.
A researcher is interested in the effect of an electrolytic sports drink on the endurance of adolescent boys. A group of 30 boys is selected and half are given a treadmill endurance test while consuming the sports drink and the other half take the..
Suppose we have the following information from a single regression: What is the coefficient of determination? What is the correlation coefficient?
Intersection of two mutually exclusive events: can be any value between 0 to 1, must always be equal to 1.
Such things as historical documents, newspaper reports, TV and radio broadcasts, when used in research, represents
Find a 90% confidence interval for the population average µ of the percentage of hospitals providing at least some charity care.
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