PSY201H1 Lecture Notes - Lecture 2: Human Hair Color, Linear Map, Multimodal Distribution
10 May 2016
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Document Summary
Experimental study; control other variables and manipulate single variable. To see what is the effect of that one variable. Interpolation: calculate cf(cumulative frequency), percentage(x100), percentile (find width of interval) Multi-task paper: sample= university age students, population=people of the world, type of study= correlational (b/c no manipulation, don"t know certain cause), unit of measurement= continuous, ratio scale. (ch3) Central tendency: 1. cons= misleading b/c considering single number that represent the distribution and not consider rest of information. Serve as descriptive statistic; organize and summarize data (vs inferential statistic= general conclusion of data about population) Mean= cannot use for bimodal (median) or skewed (mode) distribution, can measure standard deviation, sum of all values divided by number of values, cannot use ordinal scale, in manuscript or published reports sample mean identified with letter m. Linear transformation= any change of formula-> effect on mean but not on relationship values and average they are just shifted.
