Chi-Square Test (AQA A-Level Geography): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the main purpose of the chi-square test?
What is the main purpose of the chi-square test?
To determine if differences are real or chance
What does 'observed data' represent in a chi-square test?
What does 'observed data' represent in a chi-square test?
Actual measurements collected in fieldwork
What does the null hypothesis assume about data patterns?
What does the null hypothesis assume about data patterns?
Any pattern is not significant & due to chance
Which formula correctly represents the chi-square calculation?
Which formula correctly represents the chi-square calculation?
χ² = Σ(O-E)²/E
How do you calculate degrees of freedom for chi-square?
How do you calculate degrees of freedom for chi-square?
n - 1 (where n = number of categories)
What does a 0.05 significance level mean?
What does a 0.05 significance level mean?
5% probability the pattern occurred by chance
When should you reject the null hypothesis?
When should you reject the null hypothesis?
If calculated χ² ≥ critical value
What is the minimum number of observations required per category?
What is the minimum number of observations required per category?
5
In the corrie example with 40 corries & 4 directions, what is each expected value?
In the corrie example with 40 corries & 4 directions, what is each expected value?
10
With χ²=8.6, df=3, & critical value 7.82 at 0.05 level, what can you conclude?
With χ²=8.6, df=3, & critical value 7.82 at 0.05 level, what can you conclude?
Reject null hypothesis at 95% confidence