Discussion
Match the error with its remedy.
1. Random error 2. Systematic error 3. Gross error
P. Independent repetition by another observer Q. Averaging many readings R. Calibration against a standard
Answer: D
Correct answer: 1-Q, 2-R, 3-P
Each kind of error has its own remedy, and they do not substitute for one another. Random error scatters symmetrically, so averaging reduces it. Systematic error repeats, so only comparison with a standard reveals it. And a gross error is a blunder, which neither statistics nor calibration will catch - only an independent repetition by someone else.
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