introduction. what is/are statistics? tools for organizing and summarizing data tests and estimates...
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Introduction
What is/are Statistics?Tools for organizing and summarizing dataTests and estimates for generalizations
Classification of StatisticsDescriptive StatisticsInferential statistics
Classification of StatisticsDescriptive Statistics
TablesGraphsAveragesRangesCorrelations
Classification of StatisticsInferential statistics
PopulationsProbabilityHypothesis testingz test, T testAnalysis of variance (ANOVA) F-test
SamplingPopulationSampleRandom sampling
Types of DataQualitative
Yes/No, Y/N, 0/1, names, descriptionsQuantitative
numbers
Level of MeasurementNominal
ClassificationOrdinal
RankedInterval/ratio
Equal intervals and true zero
Kinds of VariablesDiscreteContinuous
Types of variablesIndependent
manipulatedDependent
measured
According to the Aug. 13-16, 2007 poll, the vast majority of adults employed full or part-time, 85%, say they generally drive themselves to work. Six percent of workers say they usually ride with someone else to work, 4% take mass transportation, and 3% walk. (Asked of adults who are employed full or part-time) How do you generally get to work -- do you drive yourself, ride with someone else, walk, take mass transportation, or something else?
2007 Aug 13-16
%
Drive yourself 85
Ride with someone else 6
Take mass transportation 4
Walk 3
Something else 1
No answer *
* = Less than 0.5%
Example of Recent Poll and Statistics Used