Statistics …a science a way of finding things out.

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Presentation transcript:

Statistics …a science a way of finding things out

Statistical Data Found almost anywhere Exists in a variety of forms Assists us in making informed decisions when faced with uncertainty and without bias

Definition CollectionOrganizationAnalysis Interpretation of numerical information

Collect Data SamplesExperimentsCensusSimulations

Organize Frequency tables ChartsGraphs

Analyze Center/Shape/Spread/Outliers, Gaps Trends…As x increases, y does something Measures of central tendency Measures of spread Confidence Intervals Hypothesis Tests

Interpretation Assumptions P-value and Alpha level Confidence level Z score T score Written summary

Caution Can lie with our interpretation of statistics Work diligently to use statistics to show the entire picture and the truth…by good intentions and by skill (non-ignorance)

Population All measurements of interest…entire group of those being measured Data from all…

Sample Part of the population Smaller section of those being measured Data from… Random, representative sampling

Random Samples Uh, yeah…NO! Ages of students in Math 102 at Pepp Ages of students on volleyball team Ages of students in Stewart hall dorms Ages of humans passing by Rockwell Academic Center Yesss! Random # Table w complete listing of st #s Calculator with complete list of sts Computer selects 30 from an alphabetical list