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Consider Figure 3.1 on page 13. Now, imagine that you did not generate the data, but someone gave it to you, so that you do not know how it was generated. Then what could this data represent? Or, rephrased, what could xs be? Does it look familiar?

Figure 3.1: An example showing the histogram of data generated from the normal distribution.

Questions or tasks can be answered by the tools and methods explained previously. Note that it might require to do some research by your own, such as looking into the help files or other documentation (we will of course explain how to access these). If you are using this book to prepare for an exam or test, it is probably a good preparation, but if you are in a hurry it is possible to skip these (in this book they do not add to the material explained). However, in general thinking about the issues presented will help you to solve your data-problems more efficiently.

Note that the answers to most questions can be found in E “Answers to Selected Questions” on page 1061.The answer might not always be detailed but it should be enough to solve the issue raised.