10.5 - Quantitative investigations of variation

• What’s intraspecific variation ?

  Variation within a species
• What’s interspecific variation ?

  Variation between different species
• Why is ensuring a sample is random important ?

  Should be representative of the population
• What 2 reasons can mean a random sample isn’t representative ?

  • Sampling bias
  • Chance
• What 2 ways can be used t minimise the effect of chance ?

  • Using a large sample size
  • Analysis, statistical tests
• Difference between qualitative and quantitative ?

  Qualitative: Descriptive data, non-numerical. Quantitative: Numerical data, measurable.