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Certain data obtained from a study of a group of 1000 subscribers to a certain magazine relating to their sex, marital status, and education were reported as follows: 312 males, 470 married, 525 college graduates, 42 male college graduates, 147 married college graduates, 86 married males, and 25 married male college graduates. Show that the numbers reported in the various groups are not consistent.
using t test for significance of slope to determine whether the independent variable is a significant predictornbsp of
A sample proportion is calculated from a sample size of 394. How large of a sample would we need in order to decrease the standard error by a factor of 9?
Assuming that the calls are Poisson-distributed, calculate the probability that the consultant receives at least 2 calls during any 30 minute period.
Find the width of each interval by subtracting the lower proportion from the upper proportion, and state which interval is wider.
Both Britain and France drew on colonial troops to fight on many different front of the war. how important was Africa in the great war.
Growth of pine trees. The Department of Biology at Kenyon College conducted an experiment to study the growth of pine trees. In April 1990, volunteers planted 1000 white pine (Pinus strobus) seedlings at the Brown Family Environmental Center. The ..
What would be the approximate margin of error if the researcher randomly sampled 400 adults?- What sample size would be needed to provide a margin of error of about 2%?
Of 1338 people who came into a blood bank to give blood, 253 people had high blood pressure. Estimate the probability that the next person who comes in to give blood will have high blood pressure.
Assume that demand for the upcoming weekend is normally distributed with a standard deviation of 30. What is the probability all the hotel's rooms will be rented?
One of the children, though, fails to solve the problem so the researcher has an undetermined score. What is the best measure of central tendency for these data?
Would you have included more and/or different variables? Explain your answer. What would you have done differently in this case? Why?
A new procedure is being tested for the assembly of electronic circuit boards. For each of five employees, the time required to assemble a board is measured for both the current procedure and the method that has been proposed.
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