Data Collection and Quality (VCE SSCE Chemistry): Flashcards
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Observations relating to type/category (e.g., color, state)
Observations relating to type/category (e.g., color, state)
Qualitative data
Variable you deliberately alter in experiment
Variable you deliberately alter in experiment
Independent variable
Variable that responds to changes
Variable that responds to changes
Dependent variable
Data measured or observed directly (also called primary data)
Data measured or observed directly (also called primary data)
Raw data
Raw data organized, altered, or analyzed (e.g., averages)
Raw data organized, altered, or analyzed (e.g., averages)
Processed data
How close repeated measurements are to each other
How close repeated measurements are to each other
Precision
How close a measurement is to the true value
How close a measurement is to the true value
Accuracy
Errors with constant bias, always in same direction
Errors with constant bias, always in same direction
Systematic errors
Errors following no pattern (sometimes high, sometimes low)
Errors following no pattern (sometimes high, sometimes low)
Random errors
Minimum trials needed for repeatability
Minimum trials needed for repeatability
At least 3 trials