Statistical Tests (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 probability value indicates statistical significance in biological research?
What probability value indicates statistical significance in biological research?
What does the null hypothesis assume?
What does the null hypothesis assume?
No significant difference exists
When should you use a chi-squared test?
When should you use a chi-squared test?
Comparing observed vs expected frequencies
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 categories - 1
If calculated = 2.5 and critical value = 3.84, what should you conclude?
If calculated = 2.5 and critical value = 3.84, what should you conclude?
Accept null hypothesis
What is the ideal minimum sample size for each group in a t test?
What is the ideal minimum sample size for each group in a t test?
More than 15
How do you calculate degrees of freedom for an unpaired t test?
How do you calculate degrees of freedom for an unpaired t test?
When should you use a Student t test?
When should you use a Student t test?
Comparing means of two independent groups
What is the range of values for a correlation coefficient ()?
What is the range of values for a correlation coefficient ()?
-1 to +1
What does a correlation coefficient of indicate?
What does a correlation coefficient of indicate?
Strong negative correlation