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Data Quality and Management

Outliers create this type of error Out-of Range
Unpredictable error Random Error – No correlation
Error may occur from missing data. (Example: Space not filled in) Omission Error – Distorted results
This error repeats itself Systematic Error – Skewed results
Observation points that are distant from other observations. Outliers Note: Can be included or excluded in analysis (causes skewness)
Types of Bias: Bias that occurs from not selecting a random sample Measurement bias
Types of Bias: Bias introduced because respondents believe it will be beneficial if selected. Conscious bias (key word: benefit)
Consistent and repeatable data Reliable
Resulting from accurate measurements Valid data
If a responder lies on their survey, this creates what type of bias? Information
Sorting your spreadsheet can expose these errors by moving them to the very top or the very bottom of the column Omission or Out-of-Range
An error that will fix itself over time Random
An error that will not fix itself. You must do something Systematic
Cleaning and organizing data Data Management
Created by: mgallo3
Popular Management sets




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