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In a study of waters near power plants and other industrial plants that release wastewater into the water system, it was found that 5% showed signs of chemical and thermal pollution, 40% showed signs of chemical pollution, and 35% showed evidence of thermal pollution. Assume that the results of the study accurately reflect the general situation. What is the probability that a stream that shows some thermal pollution will also show signs of chemical pollution? What is the probability that a stream showing chemical pollution will not show signs of thermal pollution?
To test whether or not there is a difference between treatments A, B, and C, a sample of 12 observations has been randomly assigned to the 3 treatments. You are given the results below.
the workers in a large meat packing plant earn annual incomes with mean 30000 and standard deviation of 9000. a labor
Tommy's allowance is $5.50 per week. How much is that using the least number of dollars and dimes
Maxima and minima of normal variables. Calculate the expected values of max (X, Y) and min (X, Y).
Construct a 95% confidence interval for the population mean, assuming a normal distribution?
Compute the raise percent for each faculty member. Take the difference between the 2011-2012 salary and the 2010-2011 salary, divide by the 2010-2011 salary
Use backward elimination stepwise regression to determine which combination of the oil derivative prices drive the CPI.
What is the probability of obtaining a score equal to or greater than 90?
Midnight blue and dark green are the two most popular colors. How many different backpacks in these colors does the company offer?
The principal of Bon Air school thinks that the average test score of students at Bon Air is higher than the state average of 105.
Refer to the cracker promotion example on page 926. A student stated, in discussing this case: "Strictly speaking, you cannot conclude anything about whether the three promotions differ in effectiveness because there was no control.
The probability that an American CEO can transact business in a foreign language is .20. Ten American CEOs are chosen at random.(Round your answers to 4 decimal places.)
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