COB 191 Study Guide - Quiz Guide: Royal Institute Of Technology, Quartile, Leading Question
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Data: value info: data facts p. data: you collect for your use. Nonresponse error: no follow up on nonresponse xi x . 2 n i=1 sec. data: collected by someone else. Party, eye color) (cate)nominal: no labels (zip code) Quant: numerical values counted (# of children, /hr) measured (weight, voltage) Sampling error: random diferences from sample to sample. Dist: tally of how many of each factor. Counif = # & words, count = # Hdj x-: sample meam, n: same size xi-x-: dif. between each data value & sample mean: =var. d. Rel freq dist: divide freq by total z-score: zero=mean, +>mean,-
