A.3 Answers to Lecture 3 tutorial

A.3.1 Answer to Sect. 3.5

Histogram: for quantitative (usually continuous) data; Bar chart: for qualitative data.

A.3.2 Answers to Sect. 3.6

Answers implied by H5P.

A.3.3 Answers to Sect. 3.7

1. True experiment: Treatments given (experiment), and the researchers selected the groups, groups did not previously existed (so true experiment). 2. Observation: Each patient. Analysis: The patient. 3. Pretty good. A label on the horizontal axis would be better, but the caption does contain that information. 4. Pain is reduced. 5. Yes, probably. We cannot be sure due to randomness…

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