inferential statistics

Cards (15)

  • 5% level balances out the risk of making type 1 errors and type 2 errors
  • type 1 error is when the psychologist accepts the experimental hypothesis and rejects the null hypothesis when the results were actually due to chance
  • type 2 error is when the psychologist accepts the null hypothesis and rejects the experimental hypothesis when the results were actually due to the IV
  • interval data- numbers on a fixed scale
  • ordinal data- rankings/ratings
  • nominal data- categories
  • nominal, test of difference, unrelated
    chi- squared
  • nominal, test of difference, related
    sign test
  • ordinal, test of difference, unrelated
    mann-whitney
  • ordinal, test of difference, related
    wilcoxon
  • ordinal, relationship
    spearman’s rho
  • interval, test of difference, unrelated
    unrelated t-test
  • interval, test of difference, related
    related t-test
  • interval, relationship
    pearson’s r
  • using critical value tables
    1. one tailed/ two tailed
    2. number of participants (N)
    3. level of significance (p<0.05)
    4. whether the calculated value is greater than/smaller than or equal to the critical value