Summary] Measurement and Scales

BRM Chapter 12 Measurement and scales 12.1The nature of amount; to provide the highest quality, lower-error randomness for hypothesis Measurement is a three-part process: 1.Selecting observable experiential vitrines. 2. evolution a set of part rules a shunning for designate metrical composition or symbols to represent aspects of the event being measured. 3.Applying the mapping rule(s) to each observation of that event. What is measured? Objects: hold the things of ordinary experience, such as tables, people, books and cars. But also dinky concrete things, the likes of attitudes, opinions and peer-group pressures. Properties: the characteristics of the objects (height, weight, posture). 12.2Data types Mapping rules have foursome characteristics: 1. Classification: amount are used to group or sort responses. No assemble exists. 2. Order: numbers are aimed and transitiveness applies. A is greater consequently, equal to or smaller indeed B and if A>B>C, then A is also greater than C. 3. farness: differences between numbers are ordinationed. The difference between both orthodontic braces of numbers is greater then, equal to or less(prenominal)(prenominal) then the difference between any other bridge of numbers. 4. Origin: the number series has a unique free fall indicated by the number zero.

Combinations of these characteristics of classification, order, distance and origin provide four widely used classification of measurement scales: 1. Nominal; clear into two or more categories which are mutually goop and collectively exclusive. Recognized as label s and have no three-figure value (frequency! distribution). 2. Ordinal; nominal data plus an order? the transitivity postulate needs to be fulfilled (greater than, equal, less than, without showing how much) 3. Interval; incorporate the concept of equality of prison term interval (calendar time, time and temperature). 4. Ratio; an absolute zero of origin. 12.3Sources of measurement differences Errors in measurements: 1. Participant. Boredom, fatigue, reluctant...If you want to get a full essay, order it on our website: OrderCustomPaper.com

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