Statistical Sciences 1023A/B Lecture Notes - Lecture 15: Db Class 120, Marginal Distribution, Relative Risk
31 Aug 2016
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Writing down words therefore it is qualitative data. Based upon quantitative ranges but it is is qualitative. What type of data is year of study. At western according to data classes are sm. More 2nd yr classes than any other yr. Class size (# of students) and course level (year of study) Marginal distribution - gives us the column or row totals. Paying attention to one variable (yr or size) To find very sm 1st yr class = 120 divided by total. Consider distribution of 1 variable given particular value of other variable. Restrict focus to one thing then see how other variables change or vary. 1st yr classes very sm (33%) --> not many. % of first yr classes that are very sm. % of med size classes are 3rd yr. 59 (# of 3rd yr classes)/300 (total of med size classes) = 20% Constrict segment of population - example separate b/c of facial expression (emotional sta.
