POS 3703 Chapter Notes - Chapter 2: Central Tendency, Interquartile Range, Box Plot
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A variable is an empirical measurement of a characteristic. Every variable has one name and at least two possible values: name: region. Values: south, northeast, midwest, west: name: income. The word that fills in the blank is always the name of a variable. You would say what is this person"s marital status. 1. interval level variables have values that are the most precise. 2. ordinal- level variables have values that are somewhat less precise. 3. nominal level variables have the least precise values. Have values that communicate the exact amount of the characteristic being measures. Comparing two units of analysis o o o. For interval variables, the numeric codes convey the exact quantities of the measured characteristic. The difference in ages is exactly 1 year. Have values that communicate the relative amount of the characteristic being measures. May use a scale, but scale measures relative amount, not absolute amount. For ordinal variables, the numeric codes represent relative amounts, not absolute amounts.
