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To determine whether or not they have a certain desease, 150 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 10. The blood samples of the 10 people in each group will be pooled and analized together. If the test is negative. one test will suffice for the 10 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 10 people will also be individually tested and, in all, 11 tests will be made on this group. Assume the probability that a person has the desease is 0.03 for all people, independently of each other, and compute the expected number of tests necessary for each group.
Employ a four period moving average and determine the forecasted demand for August. Put your answer in the form xx.x with no additional numbers or symbols.
Determine a 90% confidence interval for the mean weight of all university male first-year students.
There are infinitely many primes of the form n^2 - 1. Please list at least 4 of these primes. (I hope it is just as easy as I think, but is there any work to this?)
If 36 women are selected at random, find the mean, and standard deviation, of the population of sample means. Suppose that the sampling is done without replacement and use a finite population correction factor.
A journal polled its readers to determine the proportion of wives who, if given a second chance, would marry their husband again.
To determine her blood pressure, Carolyn divides her day into three parts; morning, afternoon, and evening. She then measures her blood pressure at 4 randomly selected times during each part of the day. What type of sampling is used?
Levels above 200 warrant attention. If 95 teenage boys are examined. How many would you expect to have cholesterol levels greater than 225.
During the period of time phone-in reservations are being taken at a local university, calls come in at a rate of one every ten minutes.
The proportion of parts in an inventory that are outdated and no longer useful is thought to be 0.10. To check this, a random sample of n = 100 parts is selected and 14 are found to be outdated. Based upon this information, what is the probability..
If the manufacturer's claim is true, what is the probability that the claim will be rejected?
A company has random drug test employee numbers range from 1 to6296. Find probability of selecting number less than 1000 and selecting a number divisible by 1000.
Using a 0.01 level of significance, test the claim that the tutoring has an effect on the math scores.
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