Introduction to Statistics

Ordinal Scale - Outcomes can be ordered or ranked to reflect differing degrees or amounts of the characteristic being studied (first vs. second vs. third) Does not give info about the difference between first and second, second and third Interval Scale - Value assigned is based on some underlying continuum that has equal intervals (The 2-point difference between 3 and 5 and 7 and 8, drop in temp from 30C to 10C same as 50C to 30C) (Includes meas. of aptitude, achievement, or attitude) Social Sciences Parametric statistical techniques - underlying distributions assumed to be normal Ratio Scale - Has the same characteristics as the interval scale and also has an absolute zero, absolute zero implies that there can be an absence of the trait being measured (Height, weight or light) 0 can be the starting point. Symbol - X - Symbol - Wh