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ReviewFinal2014 - Statistics 2014 Spring 2010 Final Exam...

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Statistics 2014, Spring 2010 Final Exam Review Topics Chapter 1 – Data Collection Statistics, Population, Sample, Parameter, Statistic, Variable, Data Branches of statistics: Descriptive, Inferential Types of data: 1) Attribute, or qualitative 2) Numerical, or quantitative (discrete or continuous) Representative sample v. census Simple random sample of size n; how to select such a sample Sampling error v. nonsampling error Designed experiment v. observational study; experimental unit, experimental treatment, response variable Chapter 2 – Organizing and Summarizing Data Categorical frequency distribution Grouped frequency distribution: Class limits, class width, cumulative frequency, relative frequency, cumulative relative frequency Histogram, used with quantitative data – Distribution shapes Pareto chart (bar graph), pie graph – both used with qualitative data Time series plot Chapter 3 – Numerically Summarizing Data Measures of Central Tendency: 1) Mean, properties of mean; 2) Median, properties of median; 3) Mode, properties of mode Distribution shapes Symmetric: mean = median = mode Positively skewed: mode < median < mean Negatively skewed: mean < median < mode Which measure of central tendency is preferred, depending on shape of distribution and type of data.
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