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### 9 Cards in this Set

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 descriptive statistics various techniques for summarizing or presenting data ex: bar chart, pie chart, average of a collection of numbers inferential statistics various techniques by which one attempts to make a statement about an entire population based on data statistic numerical characteristic of a sample parameter numerical characteristic of an entire population random variable (RV) a rule (or function) which assigns a value to each element of a population quantative RV assign numbers to elements of the population qualitive RV (categorical) assign non-numerical values to elements of the population discrete Rv we say that a quantative RV is discrete if between two values that RV could take there is an interval of values that the random variable cannot take ex: e = # or arrivals of a RV drive-thru between 1200 and 1230 continuous RV a RV, x, is said to be continuous if the set of values that x could be is an interval of real numbers ex: time until the next arrival at a RV drive-thru