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Data Collection, Trials, and Reliability
Worksheet
Grade Level
Grade 7
7.5 Data Collection, Trials, and Reliability
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A class tests if a new app improves math facts speed. Some students practice with the app in the morning and others at night. Which change would most increase the reliability of the results?
A
Use the same practice schedule for everyone (same time length and time of day) and test multiple times.
B
Change the test each time without keeping difficulty similar.
C
Decide it works if one student improves a lot.
D
Let everyone choose their own practice schedule and hope it averages out.
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