Non-Parametric and Parametric Tests

• What test should Charlotte use to compare her Sociology result with Summer's Psychology exam?

  Unrelated t test
• What was Susan's aim in her study about make-up brands?

  To find the most popular make-up brand
• What test should be used to analyze Susan's make-up brand data?

  Chi squared
• What correlation was Phoebe investigating in her study?

  Between temperatures and aggression
• How did Phoebe measure aggression in her study?

  By giving aggression scores between 0 & 10
• What test should be used for Phoebe's correlation study?

  Spearman’s rho
• What was Mr. Cartledge's aim in his study on depression?

  To see if CBT improves depression
• What test should Mr. Cartledge use to analyze his results?

  Sign test
• What was the aim of the study investigating employability based on schizophrenia?

  To investigate perceived employability differences
• How many employers were involved in the employability study?

  18 employers
• What scale did employers use to rate the candidate?

  Scale of 1-20
• What was the critical value of U for the two-tailed test?

  17

  
• What conclusion can be drawn if the calculated value of U is less than the critical value?

  Reject the null hypothesis
• What was the calculated value of U in the employability study?

  10.5
• What type of design was used in the anger management programme study?

  Repeated measures
• What was the calculated value of T in the anger management study?

  9
• What does it mean if the calculated value of T is more than the critical value?

  The result is not significant
• What is the critical value of T for a two-tailed test at the 0.05 level when N = 10?

  8

  
• What are the hypotheses for the employability study based on schizophrenia?

  • Alternative hypothesis: There is a difference in ratings for suitability based on schizophrenia.
  • Null hypothesis: There is no difference in ratings for suitability based on schizophrenia.
• What are the steps involved in analyzing the results of the anger management programme study?

  1. Calculate the value of T.
  2. Compare with the critical value of T.
  3. Determine significance based on the comparison.
• When are parametric tests used in research?

  • When data is normally distributed.
  • When data is interval or ratio scale.
  • When sample sizes are adequate.
• What are the differences between unrelated and related t-tests?

  • Unrelated t-test: compares means of two independent groups.
  • Related t-test: compares means of the same group at different times.
• What is the significance of a two-tailed test at the 0.05 level?

  • It tests for differences in both directions.
  • It requires a critical value to determine significance.