Test of Association: Chi-squared (AQA A-Level Psychology): Quizzes
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Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What type of data does the chi-squared test specifically work with?
What type of data does the chi-squared test specifically work with?
Nominal data as frequency counts
What design does the chi-squared test use?
What design does the chi-squared test use?
Unrelated design with independent groups
What formula calculates expected frequency for each cell?
What formula calculates expected frequency for each cell?
(Row total × Column total) / Overall total
In the chi-squared formula χ² = Σ(O-E)²/E, what does O represent?
In the chi-squared formula χ² = Σ(O-E)²/E, what does O represent?
Observed frequency in each cell
How do you calculate degrees of freedom for chi-squared?
How do you calculate degrees of freedom for chi-squared?
(Rows - 1) × (Columns - 1)
What does the null hypothesis state for chi-squared?
What does the null hypothesis state for chi-squared?
No difference; any observed is due to chance
When do you reject the null hypothesis in chi-squared?
When do you reject the null hypothesis in chi-squared?
When calculated value > critical value
Why must each person appear in only one category?
Why must each person appear in only one category?
To ensure data independence
What are the two types of alternative hypothesis?
What are the two types of alternative hypothesis?
Directional and non-directional
What is the minimum contingency table size for chi-squared?
What is the minimum contingency table size for chi-squared?
2 × 2 categories