Numerical, Data is numbers. e.g.s shoe size, height, rainfall, number of kids in a family, Continuous, Measurable . Numerical data that can take on a range of values, Discrete, Countable. numerical data that can only take on set values, Bivariate, Data for two variables. Height versus arm span, Univariate, Data for one variable . ex height, Primary, Data collected by person who's going to use it, Secondary, Data that's already available e.g. internet, Magazines, Population, The entire group being studied., Sample, is a group that is selected from the population., Census, a survey of the whole population, Biased Sample, Sample that does not represent the population, Convivence Sample, method of collecting samples by taking samples that are conveniently located around a location or Internet service., Random Sample, A sample where each thing in the population is equally likely to be chosen, Categorical, Data is text. e.g favourite phone brand

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