LS221 Study Guide - Cumulative Frequency Analysis, Pie Chart, Interquartile Range

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Statistics - the science and practice of developing human knowledge through the use of empirical data: based on statistical theory which uses probability theory to estimate popular values. Mathematical statistics - study of how to create the statistical methods using mathematical principles. Applied statistics - the practice of developing knowledge by using statistical methods to analyze data and make inferences about the population from which the data came. Ethics and statistics: we must present our data and findings in an honest and professional manner, four major areas of responsibility, responsibility to society, responsibility to employers and clients. Responsibility to other statistical practitioners: variable - a phenomenon of interest that can take on different values and can be measured. Independent versus dependent variables: dependent variable - changes as a result of the change in an independent variable, independent variable - variable that is hypothesized or suggested to influence the dependent variable.

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