Question Constellation Sign up for free AQA · GCSE · Combined Science · Higher
Repeat readings and mean calculation
The student recorded values for the frequency and the wavelength of waves in the ripple tank.
What is the advantage of taking repeat readings and then calculating a mean?
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Marking points
- 1 State that taking repeats and calculating a mean reduces the effect of random errors.
Full-mark answer
It reduces the effect of random errors.
Why this answer loses marks
It makes the result accurate.
This is too vague unless it links the mean to reducing random errors or identifying anomalous readings.