You are interested in the number of courses per semester enrolled by the students at Simon Fraser University who got admitted between 2020 and 2021.   (a) Discuss how you are going to conduct an unbiased sample of 600 students for your purpose, using stratified sampling and systematic sampling, respectively.   (b) State the type of data and the level of measurement of the key variable in your study.   (c) What kind of graph is most suitable for the variable?

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