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Further Reading

The contents of this chapter are described in most elementary textbooks on statistics. Many such books take a rather mathematical approach to the subject. It is often beneficial for the understanding to present statistical ideas and tools by practical examples. Statistics for Experimenters by Box, Hunter and Hunter  does so in a clear way and is probably one of the better statistics books available for people doing experimental work. Those readers who want to write programs for statistical analysis might consider Statistics – an introduction using R by Crawley . “R” is a freely available language and environment for statistical computing and graphics. It is platform independent and can be downloaded at http://cran.r-project.org/.

ANSWERS FOR EXERCISES
7.1 Make a numbered list over all addresses in the nation. Draw the numbers using a random number generator, for example using the Excel function = RAND().
7.2 Mean = 7.22, median = 7, mode = 7.
7.3 Mean = 3, median = 3 for all three dot plots. The range is 0 in the top dot plot and 4 in the other two.
7.4 Standard deviation = 3.96.
7.5 See the answer for Exercise 8.9 and the discussion of these data in connection to the one-sample t-test in Chapter 8.
7.6 See the discussion of these data in connection to the two-sample t-test in Chapter 8.
7.7 Z= 1.61. The cumulative probability F(Z) = 0.9463 (read from the table of standard normal probabilities in the Appendix). The probability of finding a rate greater ...

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