A die is rolled 60 times giving faces 1 to 6 with frequencies 8, 12, 9, 11, 10 and 10. What is the chi-square statistic for testing that the die is fair?
Correct answer D. 1.0
Explanation
Each expected frequency is 10. Squared deviations are 4, 4, 1, 1, 0, 0 with total 10, so χ² = 10/10 = 1.0.
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