# Statistics Chapter 1

 constructs attributes or characteristics that cannot be directly observed (i.e. intelligence, hunger, anxiety) operational definition defines a construct in terms of external behaviors that can be observed and measured(i.e. IQ test performance, hours since eating) discrete variable separate, indivisible categories (i.e. male, female) continuous variable infinite number of possible values; each measurement is an interval that must be defined by boundaries real limits boundaries of intervals for scores; exactly 1/2 way between the scores above and below 1) upper real limit2) lower real limit nominal scale set of categories that have different names; does not make any quantitive differences ordinal scale set of categories that are organized in and ordered sequence corresponding to differences in magnitude(example: ranking - 1st, 2nd, 3rd place) interval scale series of ordered categories that form a series of intervals that are exactly the same (inches, seconds, lbs); zero is arbitrary and holds no value ratio scale anchored by a a zero point that represents complete absence; measures direction and size of magnitude order of mathematical operations: 1. ( )2. exponents3. x or /4. sigma5. + or - Authorkoreanjohn32 ID123896 Card SetStatistics Chapter 1 Descriptionterms for chapter one Updated2011-12-15T19:45:14Z Show Answers