Quantitative Investigations of Variation (AQA A-Level Biology): Flashcards
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Interspecific variation
Interspecific variation
Differences between different species
Intraspecific variation
Intraspecific variation
Differences between individuals of same species
Sampling bias
Sampling bias
When sample selection is biased, making it unrepresentative of the population
Purpose of random sampling
Purpose of random sampling
Eliminates human bias in sample selection
Mean, mode & median in normal distribution
Mean, mode & median in normal distribution
All have the same value
Mean (definition)
Mean (definition)
Sum of values divided by number of items
Mode
Mode
Most frequently occurring value in sample
Median
Median
Middle value when data arranged in order
Small standard deviation indicates
Small standard deviation indicates
Values cluster closely around mean
% within SD of mean in normal distribution
% within SD of mean in normal distribution
68%