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Question: Suppose that with the best technology one can measure nebulae distances with a standard deviation of 0.25 megaparsecs about their regression on recession velocity. Suppose further that one can observe nebulae whose recession velocities have a standard deviation of about 400 km/sec. How many nebulae should be sampled to obtain a 95% confidence interval on the age of the universe, with a width of 1 billion years? (Recall that 1 billion years is about 0.001021 megaparsec-seconds per kilometer.) How many nebulae are required if one can sample nebulae with recession velocities having a standard deviation of 600 km/sec?
A computer system has ten similar modules. The circuit has redundancy which ensures the system operates if any eight or more of the units are operative.
Is by used with significantly different frequency by the two writers? Explain how these results help in deciding about the 12 disputed papers.
Calculate the Optimal Level of Output and Maximum Profit
A quality control engineer knows that 10% of the microprocessor chips produced by a machine are defective. Out of a large shipment, five chips are chosen.
How would you graph the semi-interquartile range corresponding to a given frequency distribution and What is the relationship of the semi-interquartile range to the ogive of the distribution?
the results of a mathematics placement exam at two different campuses of mercy college followcampus
Assume A œ A œ A œ A œ A œ " # $ % & that all the tanks are filled to the capacity, and calculate the mean, variance, and standard deviation of the quantity stored in the tanks.
What is meant by the sixteenth- and seventeenth-century belief that "genuinely new knowledge" about nature and humankind could be discovered?
If the reporter were to subject the president's statement to statistical scrutiny by questioning a sample of the company's residential customers, would the test be one-tail or two-tail? What would be the appropriate null and alternative hypotheses..
A sample of 64 statistics students at a small college had a mean mathematics ACT score of 28 with a standard deviation of 4. Estimate the mean mathematics ACT score for all statistics students at this college. Give the 95% confidence interval.
A friend of mine is giving a dinner party. His current wine supply includes 12 bottles of zinfandel, 10 of merlot, and 8 of cabernet. If he wants to serve 3 bottles of zinfandel and serving order is important, how many ways are there to do this?
Test the hypothesis that the graph should pass through the origin (i.e. α = 0). Explain what this means in practical terms - The air in a "clean room" used for the production of electronic devices is cleaned by filtering.
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