Chi-squared Test (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What does the null hypothesis assume in a chi-squared test?
What does the null hypothesis assume in a chi-squared test?
Observed differences are due to chance
What is the minimum sample size required for a valid chi-squared test?
What is the minimum sample size required for a valid chi-squared test?
Over 20
What type of data can be used in a chi-squared test?
What type of data can be used in a chi-squared test?
Raw counts only
In the chi-squared formula , what does represent?
In the chi-squared formula , what does represent?
Observed numbers
How do you calculate degrees of freedom for a chi-squared test?
How do you calculate degrees of freedom for a chi-squared test?
Number of classes minus one
What is the critical probability value () used as the threshold in chi-squared tests?
What is the critical probability value () used as the threshold in chi-squared tests?
0.05
If your calculated probability is greater than 0.05, what should you conclude?
If your calculated probability is greater than 0.05, what should you conclude?
Accept null hypothesis; deviation by chance
If your calculated probability is less than 0.05, what should you conclude?
If your calculated probability is less than 0.05, what should you conclude?
Reject null hypothesis; significant deviation
What is the chi-squared test particularly useful for testing in genetics?
What is the chi-squared test particularly useful for testing in genetics?
Whether crosses match Mendelian ratios
What is the expected F₂ ratio for a dihybrid cross between heterozygous F₁ plants?
What is the expected F₂ ratio for a dihybrid cross between heterozygous F₁ plants?
9:3:3:1