Conduct inferential tests. For each, state the type of test, the null and alternative hypotheses, the critical statistic, all SS and standard error terms, the obtained statistic, and the decision. Provide other statistics as indicated below. Assume α = .05 throughout. Show all calculated formulas.
- Is there a difference in reading motivation between the overall sample measured prior to assignment to condition and the expected mean value?
- In addition to the main analysis, provide the 95% confidence interval and interpret.
- Is there an effect of treatment condition on word recognition?
- What is the effect size?
- If the null hypothesis is rejected, perform Turkey’s HSD test and interpret.
- Select the participants ONLY in the condition with the highest mean on the word recognition test. Test the hypothesis that these participants gained reading motivation from pre-intervention to post-intervention.
- What is the effect size?
- Provide the 95% confidence interval and interpret.
Sample Solution
