Test of Association- Chi-Squared

• What is the Chi-Squared test used for?

  It tests for differences in data.
• What type of data is used in the Chi-Squared test?

  Nominal data recorded as frequency counts.
• What does it mean that there are two independent groups of children?

  It indicates an unrelated design.
• What is the level of measurement for the data collected?

  The level of measurement is nominal.
• What are the two categories of ability measured in the study?

  Ability to decentre or not.
• What are the hypotheses in the study?

  • Alternative hypothesis: More 8yr olds can decentre than 5yr olds.
  • Null hypothesis: No difference in decentring ability between ages.
• What type of hypothesis is the alternative hypothesis in this study?

  It is directional and one-tailed.
• What does the null hypothesis state in this study?

  No difference in decentring ability exists.
• What is the first step in conducting the Chi-Squared test as mentioned?

  Create a 2x2 contingency table.

  
• What are the calculated and critical values mentioned in the study?

  T=53 and N=20.