PSY 310 Lecture Notes - Lecture 11: Descriptive Statistics, Level Of Measurement, Statistical Inference
15 Oct 2016
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Ex. first, second, third place in a race. Ex. first, second, and third when the units between each rank is the same. True zero: a(cid:271)se(cid:374)(cid:272)e of (cid:449)hate(cid:448)er (cid:455)ou"re (cid:373)easuri(cid:374)g; is a(cid:374) a(cid:271)se(cid:374)(cid:272)e, (cid:374)ot a(cid:374) a(cid:373)ou(cid:374)t. Be careful with ratio scales make sure there is a true zero point. Directly determines the type of statistic test you can use. Ratio: rank, equal interval, true zero; ratios much be equivalent (makes it different from interval); no negative measurements. Temperature measured in fahrenheit (celsius also, but kelvin is a ratio scale) First, second, and third place winners at the racetrack. A researcher whether scores on a final exam are influenced by whether background music is soft, loud, or absent. A researcher examines wine preference by asking people to choose between a small set of three pre-selected wine brands (brand a, brand b, and brand c)
