2. Educational researchers predict that there may be a relationship between sLuuents 'personality type' and preference of learning method. Data was collected from Cornerstone Institute and presented in a contingency table for analysis. PERSONALITY TYPE LEARNING METHOD INTROVERT EXTROVERT AMBIVERT ONLINE 44 66 50 CONTACT 36 24 30 a. Help the researchers to test the hypothesis using an alpha level of .05. Show all hypothesis testing steps and manual calculations. (15) b. Calculate the effect size (5) [20 Marks] 3. The education department is interested in the difference between two interventions to improve critical thinking among students. Two samples from different classes were chosen for the study. One class was provided with an intervention while the other continued with the traditional method of teaching for critical thinking. Class A Class B 4 2 6 5 4 3 6 5 9 4 5 2 9 2 a. Test for the hypothesis that there is a statistically significant difference between the two groups of students. Use .05 alpha level. Show all your hypothesis testing steps and manual calculations. (15) b. Calculate the effect size for the intervention. (5) [20 Marks]