Question

The table below shows the number of students in each year at a certain university:

Year of study 1 2 3 4 5 6 7

No. of students 300 280 275 175 92 48 30

You would like to select a random sample of 100 students from this university.

i. Explain how you would choose a simple random sample.

ii. Explain how you would choose a sample using systematic (interval) sampling method.

iii. If you use stratified sampling method to choose a sample, explain how this could be done and how many students from each year group are to be chosen for the sample.

Answer 1