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### 22 Cards in this Set

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 What is interval measurement? The numbers assigned to equivalcne classes have the properties of distinctness and order. In addition, equal differences between numbers reflect equal magnitude differences between the corresponding classes. THe measurement procedure consists of defining a unit of measurement and determining the number of units required to represent the difference between equivalcne classes. What is ratio measurement? The numbers assigned to equivalcne classes have properties of distinctness, order, equivalcne of intervals and, in addition, the origin of the scale represents the absence of the measured characteristic. Give some examples of the nominal level of measurement. Gender, eye color, racial origin, personality types and primary taste qualities. Give some examples of ordinal levels of measurement. Military rank, classification of mentally retarded children, rank in high school and a supervisor's rank of employees. Give some examples of interval levels of measurement. Fahrenheit and Celsius temperature scales, calendar time and altitude. Give some examples of ratio levels of measurement. Height, weight, Kelvin temperature scale and measures of elapsed time. Population? Definition Collection of all: People. Objects or Events having one or more specified characteristics. Define - element. An element of a population is a single person, object or event. What is an observation OR datum? The # or label used to represent an element (single person, object or event) of the population (the collection of all people, objects or events having one or more specified characteristics). What is a sample? A sample is a proper subset of a population (the collection of all people, objects, or events having one or more specified characteristics). What is descriptive statistics? Tools for depicting or summarizing data so that they can be more readily comprehended. What is induction? Observing a sample of elements and generalizing from the sample (a proper subset of a population) to all the elements (a single person, object or event). What is interferential statistics? Tools for inferring the properties of one or more populations (the collection of all people, objects, or events having one or more specified characteristcs) from an inspection of samples (a proper subset of a population) drawn from the populations (the collection of all people, objects, or events having one or more specified characteristics). What is random sampling? The method of drawing samples (a proper subset of a population) from a population (the collection of all people, objects or evengs having one or more specified characteristics) such that every possible sample of a particular size has an equal chance of being selected. What is sample fluctuation (or chance variability)? The elements (a single person, object or event of the population) obtain differe from sample to sample. What is a variable? A variable is a characteristic that can take on different values. A variable is also a symbol that is used to stand for an unspecified element of a set. What is a constant? A characteristic that does not vary. What is a qualitiative variable? A symbol whose range consists of attributes or nonquantitative characteristics of people, objects or events. What is a quantitative variable? A symbol whose range consists of a count or a numerical measurement of a characteristics. What is measurement? The process of assigning numbers or labels to characteristics of people, obbjects or events according to a set of rules. What is nominal measurement. The simplest of the four levels of measurement. It consists of assigning elements to mutually exclusive and exhaustive equivalence classes so that those in the same class are considered to be equivalent to one another, whereas those in different classes are not equalivant. What is ordinal measurement? Assigning elements (a single person, object or event) to mutually exclusive and exhaustive equivalence classes that are ranked or ordered with respect to one another.