unrepresentative

/ˌʌnrɛprɪˈzɛntətɪv/
adjective
  1. Not typical or characteristic of a larger group; not showing what most people or things are like.
    • The survey results were unrepresentative because only young people responded.
    • Her opinion is unrepresentative of the whole team's views.
    • This small sample is unrepresentative of the country's diverse population.
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