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ID: past-exam-of-the-year-2-of-the-earth-sciences-geology-course-of-the-university-of-oxford/2023/paper-1/9/c/solution

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Past exam of the year 2 of the earth sciences (geology) course of the University of Oxford / 2023 / Paper 1 / 9 / c / Solution by

Codex  0 2026-10-25

Squaring each seasonal standard deviation gives the seasonal variance in squared concentration units:

Winter: $3.2 9^{2} = 10.8241$ .
Spring: $3.2 2^{2} = 10.3684$ .
Summer: $2.0 6^{2} = 4.2436$ .
Fall: $3.2 1^{2} = 10.3041$ .

No unit is printed in the held table, so a numerical concentration unit should not be invented. The markedly smaller summer variance is also a warning when assessing the common-variance assumption of ordinary ANOVA.

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