Why does every measured value have some uncertainty?
No measurement is perfectly exact.
AQA GCSE Combined Science: Trilogy (8464) — Chemistry — Higher · 5.3.1.4
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Why does every measured value have some uncertainty?
No measurement is perfectly exact.
What pattern do repeated measurements usually form?
A spread of values, often with many clustering around the mean.
What does the spread of repeated measurements indicate about uncertainty?
A tight spread suggests lower uncertainty; a wide spread suggests greater uncertainty.
How can the range and mean be used to estimate uncertainty from repeated measurements?
Find the range from the highest and lowest values, then relate that spread to the mean.