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Which hospital is safer? Insurance companies and consumers are interested in the performance of hospitals. The government releases data about patient outcomes in hospitals that can be useful in making informed health care decisions. Here is a two-way table of data on the survival of patients after surgery in two hospitals. All patients undergoing surgery in a recent time period are included. "Survived" means that the patient lived at least 6 weeks following surgery.
What percent of Hospital A patients died? What percent of Hospital B patients died? These are the numbers one might see reported in the media.
a plastic casing for a magnetic disk is composed of two halves. the thickness of each half is normally distributed with
a fan index is caluclated for each of the professional sports to give an idea of what it costs for a family to go to a
Let t = the amount of sales tax a retailer owes the government for a certain period. The article "Statistical Sampling in Tax Audits" (Statistics and the Law, 2008: 320-343) proposes modeling the uncertainty in t by regarding it as a normally dist..
Maria and Ellen both specialize in throwing the javelin. Maria throws the javelin a mean distance of 200 feet with a standard deviation of 10 feet.
Write null and alternative hypotheses about sex and the risk of a lower-extremity injury while playing interscholastic soccer.
Identify the individual who, in your opinion, had the greatest impact on your particular interest or specialty within the field of psychology.
a sample of 200 elements from a population with a known standard deviation is selected. for an interval estimation of m
How do we account for the sudden increase of heresies in the twelfth century?
a company has estimated that a proposed 10000 investment will generate 3250 for each of the next four years. their
a steam power plant has steam leaving the boiler at 1 mpa and 300 degrees c. if the plant operated with a condenser
suppose we are testing the null hypothesis ho20 and the alternative ha does not 20 for a normal population with a
A company that manufactures specialty batteries used as auxiliary back- ups for sensitive laboratory equipments in need of constant power sup- plies claims that its new prototype, brand A, has a longer lifetime (un- der constant use) than the indu..
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