A researcher is interested in the cumulative grade point average (CGPA) of students who enrolled in a Statistics course this semester. There are three groups, namely A, B and C which consist of 30 students for group A, 40 students for Group B and 30 students for group C. A sample of 50 students are randomly selected in this study.

i) State the population and sampling frame.

ii) State the variable of interest.

iii) Give the appropriate sampling technique to be used for this study.

iv) Calculate the number of students that should be selected from each group.

v) Suggest the data collection method for this study. Give ONE advantage and ONE disadvantage.

i) State the population and sampling frame.

ii) State the variable of interest.

iii) Give the appropriate sampling technique to be used for this study.

iv) Calculate the number of students that should be selected from each group.

v) Suggest the data collection method for this study. Give ONE advantage and ONE disadvantage.