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The development of viral hepatitis subsequent to a blood transfusion can cause serious complications for a patient. The article,"Hepatitis in Patients with Acute Nonlymphatic Leukemia" (Amer. J. of Med. (1983): 413-421) reported that in spite of careful screening for those having a hepatitis antigen, viral hepatitis occurs in 7% of blood recipients. Suppose a new treatment is believed to reduce the incidence of viral hepatitis. The treatment is given to 200 blood recipients and only 6 contract hepatitis. Does it appear that the treatment is effective? That is, is it very likely that we would observe only 6/200 contract hepatitis when 7% of the population is known to do so?
Recent medical research demonstrated there is a strong (r=.60) correlation between the excessive weight and incidences of breast cancer. How can we interpret this statement?
If the shop does not want to give more than 1% of its customers a free lube and oil change service, how long should the guarantee be?
What is the probability that at least one of the alternations is discovered? Find the expected value and variance of the number of altered accounts discovered during the audit.
A study regarding the relationship between age and the amount of pressure sales personnel feel in relation to their jobs revealed the following sample information.
Based on information, compute the following: Percentage (or portion) of children who watch television less than 6.5 hours a week.
The quality control director for a clothing manufacturer wants to study the effect of operators and machines on the breaking strength (in pounds) of wool serge material. Is there an interaction between operator and machine?
Evaluate the mean wait time and throughput rate
Ski Resorts of Vermont, Inc. is considering a merger with Gulf Shores, Inc. of Alabama. The board of directors surveyed 50 stockholders concerning their position on the merger.
When the level of confidence and sample size remain the same, a confidence interval for a population proportion π will be __________ when p(1-p) is larger than when p(1-p) is smaller.
Using decision tree analysis, decide whether Jay must proceed with his law suit against manufacturer.
Your office has just received 140 insurance claims to be processed in the next few days. Find the following probabilities.
You are asked to conduct a study to determine if gender has any bearing on the choice of a dog or cat as a pet. You take a random sample of 350 adults and ask each what kind of pet they would prefer, a dog or a cat?
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