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Medical errors are common in hospitals throughout the world. One possible causal factor is the long work hours of hospital personnel. In a pilot study investigating this issue, medical residents were encouraged to sleep 6-8 hours per night for a 3-week period instead of their usual irregular sleep schedule. The researchers expected, given previous data, that there would be one medical error per resident per day on their usual irregular sleep schedule.
Suppose two residents participate in the program (each for 3 weeks), and chart review finds a total of 20 medical errors made by the two residents combined.
a. What test can be used to test the hypothesis that an increase in amount of sleep will change the number of medical errors per day?
b. Implement the test in Problem 7.90, and report a two-tailed P-value.
c. What would be the power of the type of test used in Problem 7.91 under these assumptions?
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A surveyor standing 68 meters from the base of a building measures the angle to the top of the building and finds it to be 40°. The surveyor then measures the angle to the top of the radio tower on the building and finds that it is 49°. How tall is t..
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compute increases decreases in percents for both years six and seven by entering all the missing data in the table
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