BIO 210 Study Guide
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continuous measurement variable
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can assume any imaginable value within a certain range
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discrete measurement variable
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whole numbers
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ranked variables
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ranked with respect to their relative magnitude
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attributes
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variables that can be expressed quantitatively not ranked with respect to relative magnitude
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derived variables
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variable computed from two continuous variables
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transformed variable
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the result of a mathematical operation on the original variable
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response variable
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variation depends on another variable
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predictor variable
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variable that the response variable is contingent upon
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data
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individual measurements of a variable made on individual units of the population
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frequency
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count of the number of observations in a category
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bimodal
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contains one peak or more than one peak
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mode
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most common value
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mean
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arithmetic value
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median
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has an equal number of items above and below it
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histogram
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no space; continuous
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bar graph
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spacing
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binomial distribution
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fixed number of trials; probability is known; special opportunities exist
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Poisson distribution
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average rate at which the event occurs within a certain time and space; no parameters exist
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randomness
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process of selection in which each item of a set has an equal chance of being chosen
