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At a food processing plant, a machine produces 10 lb bags of sugar. In this particular process, it is important that the sugar content does not go below 9.9 lbs. In fact, when the bags of sugar are less than 9.9 lbs, maintenance is performed on the machine. Consider a hypothesis test where:
Ho: X > 9.9 lbs. (In this case operation is continued) Ha: X < 9.9 lbs. (In this case maintenance is performed on the machine)
The mean of a set of 7 numbers is 13. What is the sum of the numbers? Find the mode of the following test scores: 89, 78, 91, 82, 75, 89, 84, 95, 89, 93
Compute β-error of test in part (a) if true difference in mean burning rate is 2.5 centimeters per second.
The following data represent the number of weed-eaters sold per month at a local garden shop and their prices
What would be the most appropriate graphical representation to show the dispersion of new home prices in a particular area? Why?
What purpose does a multiple regression analysis serve? Give an example of how it might be used in marketing research.
Assume the arrival of these emails is approximated by the Poisson distribution.
A bond analyst is analyzing interest rates for corresponding municipal bonds issued by two different states. At α = .05, is there a difference in interest rates paid by two states?
What is the purpose of a post-hoc test with analysis of variance? What is probabilistic equivalence? Why is it important?
What is the interpretation of the coefficients that emerge from the regression equation. Can you predict a change in the y variable given knowledge of the x variable?
The population of IQ scores forms a normal distribution with mean of μ = 100 and a standard deviation of σ = 15. What is the probability of obtaining a sample mean greater than M = 105,
What is the minimum sample size needed in order for you to be 95% confident that your estimate is within 5 of µ? Use the value 20 for the population standard deviation of scores on this subsection.
The quality-control inspector of a production plant will reject a batch of syringes if two or more defective syringes are found in a random sample of eight syringes taken from the batch. Assume the batch contains 1% defective syringes.
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