Biodiversity (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 term describes variation between individuals of the same species?
What term describes variation between individuals of the same species?
Intraspecific variation
Why must biologists take samples rather than single measurements?
Why must biologists take samples rather than single measurements?
Cannot characterise a population from one measurement
What is sampling bias?
What is sampling bias?
Selection process is biased
What is the main purpose of random sampling?
What is the main purpose of random sampling?
To eliminate human involvement in choice
How does sample size affect reliability of results?
How does sample size affect reliability of results?
Large samples reduce chance effects
In a normal distribution, where do mean, mode and median occur?
In a normal distribution, where do mean, mode and median occur?
All at the peak of the curve
How do mean, mode and median differ in a skewed distribution?
How do mean, mode and median differ in a skewed distribution?
They have different values
What does a small standard deviation indicate?
What does a small standard deviation indicate?
Most values cluster near the mean
What percentage of measurements lie within standard deviation of the mean?
What percentage of measurements lie within standard deviation of the mean?
68%
How is the mean calculated?
How is the mean calculated?
Sum of values divided by number of items