Math Problem Statement
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Solution
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Math Problem Analysis
Mathematical Concepts
Chi-squared test
Independence test
Goodness-of-fit test
Hypothesis testing
Formulas
Chi-squared formula: χ² = Σ((O_i - E_i)² / E_i)
Expected frequency: E_i = (Row total * Column total) / Grand total
Degrees of freedom: df = (number of rows - 1) * (number of columns - 1)
Theorems
Chi-squared distribution
Degrees of freedom theorem
Suitable Grade Level
Undergraduate (Statistics)
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