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Erschienen in:
2013 | OriginalPaper | Buchkapitel
2. Random Number Generator
verfasst von : Thomas J. Quirk, Meghan Quirk, Howard Horton
Erschienen in: Excel 2010 for Physical Sciences Statistics
Verlag: Springer International Publishing
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Abstract
Salt marshes are coastal wetlands found on protected shorelines along the eastern seaboard of the USA where fresh water mixes with seawater. When ocean tides flood salt marshes, the plants living there must cope with the salt water. The “salinity” (i.e., the salt content of the water) depends on how close the marsh is to the ocean. Suppose that a biogeographer is studying the effects of salinity on vegetation in a salt marsh in Maine and that she has mapped the salt marsh into 32 separate geographic areas. Suppose, further, that she has asked you to take a random sample of 5 of these 32 areas within the salt marsh so that she can measure the percent of salinity level in each of these areas. Using your Excel skills to take this random sample, you will need to define a “sampling frame.”