Astronomy Quiz
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TOOLS, DATA & SCIENTIFIC REASONING
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An astronomer measures the visual magnitude of an asteroid on five consecutive nights, obtaining the values: 15.2, 15.4, 15.3, 15.8, 15.3. They calculate the mean as 15.4 and the standard error on the mean as 0.1. A second astronomer suggests the asteroid might be a variable object. Which statement provides the most scientifically valid reason to question the use of the standard error on the mean as the final uncertainty?
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