Data Quality and Management
Help!
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| Outliers create this type of error | Out-of Range
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| Unpredictable error | Random Error – No correlation
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| Error may occur from missing data. (Example: Space not filled in) | Omission Error – Distorted results
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| This error repeats itself | Systematic Error – Skewed results
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| Observation points that are distant from other observations. | Outliers Note: Can be included or excluded in analysis (causes skewness)
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| Types of Bias: Bias that occurs from not selecting a random sample | Measurement bias
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| Types of Bias: Bias introduced because respondents believe it will be beneficial if selected. | Conscious bias (key word: benefit)
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| Consistent and repeatable data | Reliable
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| Resulting from accurate measurements | Valid data
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| If a responder lies on their survey, this creates what type of bias? | Information
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| 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
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| An error that will fix itself over time | Random
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| An error that will not fix itself. You must do something | Systematic
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| Cleaning and organizing data | Data Management
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
mgallo3
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