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22 Cards in this Set
 Front
 Back
The observed variable that is expected to change as a result of changes in the independent variable in an experiment.

dependent variable


A number that conveys a particular characteristic of a set of data.

descriptive statistic


The study or theory of the nature of knowledge.

epistemology


Variable other than the independent variable that may affect the dependent variable.

extraneous variable


Variable controlled by the researcher; changes in this variable may produce changes in the dependent variable.

independent variable


Method of reaching conclusions about unmeasurable populations that uses sample evidence and probability.

inferential statistics


Measurement scale in which equal differences between numbers represent equal differences in the thing measured. The zero point is arbitrarily defined.

interval scale


One value of the independent variable.

level


Bottom of the range of possible values that a measurement on a quantitative variable can take.

lower limit


Arithmetic average; sum of scores divided by number of scores.

mean


Measurement scale in which numbers serve only as labels and do not indicate any quantitative relationship.

nominal scale


Measurement scale in which numbers are ranks; equal differences between numbers do not represent equal differences between the things measured.

ordinal scale


Numerical or nominal characteristic of a population.

parameter


All measurements of a specified group.

population


Variable whose levels are different kinds, not different amounts.

qualitative variable


Variable whose levels indicate different amounts.

quantitative variable


Measurement scale with characteristics of interval scale; plus zero means that none of the things measured is present.

ratio scale


A subset of a population that may or may not be representative.

sample


A numerical or nominal characteristic of a sample.

statistic


One value (or level) of the independent variable.

treatment


The top of the range of possible values that a measurement on a quantitative variable can take.

upper limit


Something that exists in more than one amount or in more than one form.

variable
