Topic (2) – Sampling and Experimental Design 2-1 Topic (2) – Sampling and Experimental Design Some DefinitionsExperimental (or Sampling) Unitis the object or event from which the measurements are taken e.g. tree where the number of leaves is measured leaf where the weight is measured acre of land where the number of trees is measured hurricane where maximum inches of rain/hour is recorded year where the number of hurricanes of class 4 is recorded A Variable is the information recorded on an experimental unit e.g. Y = number leaves/tree Y = weight of leaf Y = number of trees/acre Y = max inches of rain/hour for a hurricane Y = number of hurricanes of class 4/ year NOTE: There can be several variables measured at once on the same experimental unit
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