7.3 Inferential testing

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Cards (26)

  • Inferential testing is used to see whether a study's results are statistically significant
  • The threshold where results are considered statistically significant is usually <0.05, which means there is a less than 5% chance the observed effect is due to chance
  • The lower the p (probability) value, the more statistically significant results are
  • There are two types of errors when interpreting statistical significance:
    • Type one (false positive)
    • Type two (false negative)
  • A type 1 error is when researchers conclude an effect is real (they reject the null hypothesis) when it is not
  • A type 2 error (false negative) is when researchers conclude there is no effect and accept the null hypothesis when the effect is real
  • Type 1 errors are usually due to a probability threshold that is too high
  • Type 2 errors are usually due to a probability threshold that is too low