A patient presents with sore throat, a temperature of 38.5°C…

A patient presents with sore throat, a temperature of 38.5°C, tonsillar exudates, and an erythematous pharynx, and cervical lymphadenopathy.  To guide appropriate treatment, what diagnostic test will the APRN order to determine the most effective management this patient’s symptoms?

A manager at a local Billy Bob’s sandwich shop knows that ri…

A manager at a local Billy Bob’s sandwich shop knows that right now it takes an average (mean) of 54 seconds to assemble a sandwich.  In Dan’s past research, he learned the standard deviation of sandwich production is .7 seconds.   Marisol, a new employee, suggested some changes in the process including: rearranging some vegetable locations and changing the order of other ingredients.  Marisol is sure her ideas will save time without sacrificing quality.  After testing her new methods, the results are:  Marisol’s new method had a mean assembly time of 52.5 seconds for 10 sandwiches.   What is the value of the Z score computed for this hypothesis test?    

What type of experiment is this? In 1854, a major outbreak…

What type of experiment is this? In 1854, a major outbreak of cholera struck a neighborhood in London. Within three days 127 people near Broad Street died. By the end of the outbreak 616 people died. The physician John Snow identified the source of the outbreak as the nearest public water pump, using a map of deaths and illness that revealed a cluster of cases around the pump. In this example, Snow discovered a strong association between the use of the water and deaths and illnesses due to cholera. Snow found that the Southwark and Vauxhall Waterworks Company, which supplied water to districts with high attack rates, obtained the water from the Thames downstream from where raw sewage was discharged into the river. By contrast, districts that were supplied water by the Lambeth Waterworks Company, which obtained water upstream from the points of sewage discharge, had low attack rates.