QMS 102 Lecture Notes - Ogive, Histogram, Categorical Variable
13 Oct 2012
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Variable characteristic of an item or an individual (eg. plane trip in 6 months yes or no?) Population entire group that you are concerned about (eg. sears store -> concerned about people that shop at eaton centre. Sample representation of the population; sample of the population. Parameter the description of numeric value that goes with the population (eg. class average ) Statistic what the sample tells you (percentage) draws conclusion in the population (how much you intend to spend at eaton centre) Descriptive stats describes the data you got; makes decision to rank the data in order, tells a story. Inferential stats how to make conclusion from the stats. From small trying to make a judgement from large. Categorical eg. colour of your car (how many?) Ordinal it is in some order in categorical. Categorical can be represented in 2 ways either nominal or ordinal. Quantitative eg. what is your gpa in university two types discrete and continuous.
