Chapter3, module 5, exercise 2
Chapter3, exercise 6, module 2
Magnitudeis a property of measurement in which the ordering of numbersreflects the ordering of variables (Sarah, 2012).
Anintervalscale is a scale in which the units of measurement between thenumbers on the scale are all equal in size
Reactivityoccurswhen subject act unnaturally because they know they are beingobserved.
Interraterreliabilityproduces a reliability coefficient that assesses the agreement ofobservations made by two or more raters or judges.
Thedegree to which an instrument for measuring accurately measure atheoretic construct or trait that it is designed to measure isassessed by constructvariability.
Arranginga group of individuals from heaviest to lightest represents themagnitudepropensity of measurement.
Weightis an example ofratioscale of measurement, and political affiliation is an example of thenominalscale of measurement.
Aptitudetestmeasures an individual potential to do something, and achievementtestmeasures an individual competence in a given area.
Thecorrelation coefficients that represent the variables with theweakest degree of relationship? +0.1
Whenobservers disagree 20 times out of 80, then the interraterreliability is 75%
Thefollowing statement is true
Thelevel to which an instrument measures accurately predicts behavior orability in a given area is known as criterion validity.
Sarah , B. (2012). Statistics in a nutshell. Sebastopol, CA : O`Reilly Media.