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standard method. At the end of the term, the class average of the final grade for students taught with the new method was 3% higher

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standard method. At the end of the term, the class average of the final grade for students taught with the new method was 3% higher than that for students taught with the standard method. (a) Identify the sample and population of this study. (2 marks) (b) Is this study a designed experiment or an observational study? Explain. (2 marks) (c) Is this study descriptive or inferential? Explain. (2 marks) (d) Propose two different methods to take a simple random sample of 200 students from a collection of 800 students. (2 marks)

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