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To determine whether or not they have a certain desease, 154 people are to have their blood tested. However, rather than testing each individual separately, it has been decided first to group the people in groups of 11. The blood samples of the 11 people in each group will be pooled and analyzed together. If the test is negative, one test will suffice for the 11 people (we are assuming that the pooled test will be positive if and only if at least one person in the pool has the desease); whereas, if the test is positive each of the 11 people will also be individually tested and, in all, 12 tests will be made on this group. Assume the probability that a person has the desease is 0.09 for all people, independently of each other, and compute the expected number of tests necessary for the entire group of 154 people.
A board of directors at the Anchor Pointe Marina is studying the usage of boats among its members. A sample of 30 members who have bots 10 to 20 feet in length showed that they used their boats an average of 11 days last July.
When using the normal distribution (empirical rule) to obtain the bounds for a 99.73 percent of the values in a population, the interval generall will be _________________ the interval obtained for the same percentage if Chebyshev's theorem is ass..
The best estimator or appreciative of the population proportion is 0.45. How large must the sample be?
Assume if the students toss the coin 200 times each about 68% should have proportions among what two numbers.
3% from excise taxes and 5% other. If a revenue source is selected at random, what is the probability that it comes from individual or corporate income taxes?
I want to establish if a new product is worth marketing. At least 85 percent of the public must express interest in the product and for those that do the average cost they are willing to pay must be at least $47.50.
Joe is being audited by the IRS and must provide an estimate for his investment earnings over the next four years. After a thorough search, Joe can only find the following records.
Using an alpha of .05, what can you conclude about homogeneity of variance from the output? Word process your responses on the SPSS output pages.
Determine the optimum solution for the problem.
The experiment indicates a sample average diameter x BAR = 5.027 millimeters. Does this sample information appear to support or refute the engineer's conjecture?
The state highway department is studying traffic patterns on one of the busiest highways in the state. As part of the study, the department needs to estimate the average number of vehicles that pass an intersection each day. A random sample of 64 ..
Suppose the world series is about to begin. Some people get together and each decide to predict different win-loss patterns for the seven possible games during the coming series.
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