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Polychlorinated biphenyl (PCB) is among a group of organic pollutants found in a variety of products, such as coolants, insulating materials, and lubricants in electrical equipment. Disposal of items containing less than 50 parts per million (ppm) PCB is generally not regulated. A certain kind of small capacitor contains PCB with a mean of 47.7 ppm and a standard deviation of 7 ppm. The Environmental Protection Agency takes a random sample of 39 of these small capacitors, planning to regulate the disposal of such capacitors if the sample mean amount of PCB is 49.5 ppm or more. Find the probability that the disposal of such capacitors will be regulated.
Carry your intermediate computations to at least four decimal places. Round your answer to at least three decimal places.
Conduct the hypothesis tests to check for effects due to interaction, factor A, and factor B. Use a = 0.05 for each test. State your conclusions.
Suppose the investigators had made a rough guess of 181 for the value of s before collecting data. What sample size would be necessary
Determine the dJ. of the time until the system fails to operate.
Management wishes to test whether each shopper is spending an equal amount of money at each store. Calculate the sums of squares SS(total), SS(factor), and SS(error)
fairfield homes is developing two parcels near pigeon fork tennessee. in order to test different advertising approaches
Cans of Paint Purchased During a recent paint sale at Corner Hardware, the number of cans of paint purchased was distributed as shown. Find the mean, variance, and standard deviation of the distribution.
Suppose that women's weights are normally distributed with the mean given by mu=143 lb and standard deviation given by sigma=29 lb.f 1 woman is arbitarily selected, determine the probability that her weight is below 113
In a random sample of 400 employees, screening detected at least one of these drugs in the systems of 8% of those tested. At the 0.025 level, is the human resources director's claim credible? Determine and interpret the p-value for the test.
Let H0 and H1 be simple and let a ? (0, 1). Suppose that T* is a UMP test of size a for testing H0 versus H1 and that ß
Determine whether the following are demonstrative definitions, enumerative definitions, definitions by subclass, synonymous definitions, etymological definitions, operational definitions, or definitions by genus and difference.- "Hammer" means a t..
A random variable is normally distributed, with (population mean)= 300 pounds and (standard deviation) = 50 pounds. How small can a simple random sample be if the standard error of the mean can be no more than 20 pounds?
Estimate the population mean number of pecks made by chickens pecking at blue string using a 99% confidence interval. Interpret the result.
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