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5 Cards in this Set

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 What is the mean? an average compiled by summing the values of several observations and dividing by the number of observations. What is the mode? still another AVERAGE, representing the most frequently observed value or attribute. If a sample contains 1,000 people aged 65 or over, 275 people aged 45-66, and 33 persons aged 43 or younger, age 65+ is the modal category. What is a t-test? used when we wish to determine whether two groups representing nominal-level attitudes of an independent variable differ on some dependent variable measured at the interval or ratio level of measurement What is nominal measure? a level of measurement describing a variable the different attributes of which are ONLY differenct, as distinguished from ORDINAL, INTERVAL or RATIO Measures. Sex is an example of a nominal measure. What is a dependent variable? a variable assumed to depend on or be caused by another (called INDEPENDENT variable). If you find that income is partly a function of one's level of communication anxiety, INCOME is being treated as a DEPENDENT VARIABLE.