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Recognize Bias and Limitations in Data Collection
Worksheet
Grade Level
Pre-Calculus
Pre-CAL.178 Recognize Bias and Limitations in Data Collection
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🔴 Hard
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Which option correctly identifies the main source of bias and the best improvement to reduce it?
A
Bias: Time-of-day/day-of-week bias; Improvement: Collect data across randomly chosen times/days so one time window doesn’t dominate the sample.
B
Bias: Nonresponse bias; Improvement: Increase the response rate with follow-ups and multiple contact methods, and check for differences from nonresponders.
C
Bias: Undercoverage; Improvement: Sample students across the entire campus (for example, a random sample of meal plan holders) and include all dining options.
D
Bias: Undercoverage; Improvement: Weight the sample after the fact without fixing who could be selected.
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