Question: X2 = (Oi Ei)2 /Ei; Oi = 15, O2 = 28, O3 = 19, E1 = 11.3, E2 = 32.5, E3 = 18.2

X2 = ∑ (Oi – Ei)2 /Ei; Oi = 15, O2 = 28, O3 = 19, E1 = 11.3, E2 = 32.5, E3 = 18.2 (test statistic for goodness-of-fit test)

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