Practice Questions Instructions:This is to be completed during the lectorial. Complete all the questions of this document toget full marks. Submit this document as either a Word Document or PDF only. Failure to do so will result in receiving no marks for this question. If you are unable to attend any of the lectorial classes, it is your responsibility to complete the practise questions document and upload it in the corresponding Online Quiz. Hint:Complete this practice questions document before to take the Module 9 Quiz. Module 9 Question 1:When would we use a chi square test of association? When we want to determine if there is a significant association between observed and expected outcomes for two categorial/nominal variable. Question 2:What are the assumptions that we need to consider before running a chi square test of association? 1.Representative (the sample collected represents the population). 2.Independence (the sample are independent). 3.Counted data (must be counts of observation). 4.Expected frequency (expected must be >5). Question 3:State the statistical hypotheses for the Chi-square test of association. H0: There is no association in the population between the categorical variables (independence) HA: There is an association in the population between the categorical variables (dependence). Question 4:Complete the table below in relation to the chi square test of association: chi square test of association Equation Expected Values Degrees of Freedom RMIT - Dr. Stella StylianouModule 9- Practice questions documentRMIT Classification: Trusted
Question 5:Using your chi- square table, complete the section below. Question 6:Use a Chi-square test to determine if there is an association between final grade and lecture attendance (α=0.01): a.State the null and alternative hypotheses for this scenario. H0: There is no association between lecture attendance and final grade. HA: There is an association between lecture attendance and final grade b.State the degrees of freedom and❑crt 2 for this scenario. c.Calculate the expected values (round to the whole number) RMIT - Dr. Stella StylianouModule 9- Practice questions documentRMIT Classification: Trusted
d.Calculate the2for this scenario. e.What is our decision regarding H0 ? What type of conclusion can we make regarding this scenario? RMIT - Dr. Stella StylianouModule 9- Practice questions documentRMIT Classification: Trusted
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