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A second-stage smog alert has been called in a large city with 48 industrial firms. an inspector will visit 10 of these firms (selected at random). Let Y denote the number of firms (among the 10 firms visited) that are in violation of at least one regulation. If 15 of the 48 firms are in violation of at least one regulation, what is the probability that the inspector will visit exactly 2 firms that are in violation? at least 2 firms? at most 2 firms?
suppose we select an srs of size n 100 from a large population having proportion p of successes. let p be the
Your performance as a principal depends on how well your entire group of eight-graders scores on the exam. What is the likelihood that your group of 115 eighth-graders will have an average score below 580?
Studies have shown that humans complete a 1 mile run in an average of 12.2 minutes. There is a separate group of 30 who complete a 1 mile run with an average of 8.67 minutes with a standard deviation of 0.33 minutes.
Henry performed a two-tailed test for an experiment in which N = 24. He could not find his table of t critical values, but he remembered the tcv at df = 13. He decided to complete his obt.with this tcv. Is he more likely to make a type I or II err..
assume that you plan to use a significance level of ? 0.05 to test the claim that p1 p2 use the given sample sizes
assume you are building a system aircraft etc. for a customer but using the best technology available. you cannot
an urn contains 4 red and 6 blue balls. suppose that 8 balls are selected at random and with replacement. what is the
the time to failure of flourescent lights in a large office building is exponentially distributed with a failure rate
case study are the fish safe to eat?assessing which factors affect mercury levels in fish in maine lakes.mercury is a
a new muscle relaxant is available. researchers from the firm developing the relaxant have done studies that indicate
For the following, describe the target population, sampling frame, sampling unit and observation unit. Is there any selection bias or inaccuracy of responses?
Conduct test to find out if average sales invoice this month differs from the historical data. Level of significance a = .05
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