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An investigator wishes to estimate the average number of defects per board on boards of elec-tronic components manufactured for installation in computers. The boards contain varying numbers of components, and the investigator think that the number of defects should be positively correlated with the number of components on a board.Thus, pps sampling is used with the probability of selecting anyone board for the sample being pro- portional to the number of components on that board. A sample of n = 4 boards is to be selected from the N = 10 boards of one day's production. The number of components on each of the ten boards are 10, 12, 22, 8, 16, 24, 9, 10, 8, 31 show how to select n= 4 boards with probabilities proportional to size. After the sampling was completed, the number of defects found on boards 2, 3, 5, and 7 was respectively, 1, 3, 2 and 1. Estimate the average number of defects per board, and place a bound on the error of estimation.
Verify that this gambling interpretation leads to the correct answer for all starting states in the examples that you worked in Exercise 28.
a car insurance company performed a study to determine whether an association exists between age and the frequency of
Which of the following is the most reliable source of information? Which of the following are the most common types of doubts people may have about a source?
wayne collier designed an experiment to measure the fuel efficiency of his family car under different tire pressures.
Based on these results, does te diet appear to be effective? Does the diet appear to have practical significance?
a study of peach trees found that the average number of peaches per tree was 825. the standard deviation of the
Suppose that a researcher does a study to see how level of anxiety (A 1 = low, A 2 = medium, A 3 = high) is used to predict exam performance (Y).
Ppaid full salary for the current year. a. Determine how to minimize the bus company's salary, hiring, and firing costs over the next 5 years.
assume that a random sample is used to estimate a population proportion p. find the margin of error e that corresponds
a study of fast-food nutrition compared the caloric content of french fries. thirty-eight randomly selected servings of
The ideal number of children. "What do you think is the ideal number of children for a family to have?" A Gallup Poll asked this question of 1016 arbitrarily chosen adults. Almost half (49%) thought two children was idea suppose that p = 0.49 is e..
If a population distribution is skewed to the right, then given a random sample from that population, one would expect that the. median is greater than the mean.
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