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手植记:最稀缺仅有的4种原生态食材

A Handbook of
Statistical
Analyses
Using R
SECOND
EDITION
Brian S. Everitt and Ibrsten Hothorn



List of Figures
1.1 Histograms of the market value and the logarithm of the
market value for the companies contained in the Forbes 2000
list. 19
1.2 Raw scatterplot of the logarithms of market value and sales. 20
1.3 Scatterplot with transparent shading of points of the logarithms
of market value and sales. 21
1.4 Boxplots of the logarithms of the market value for four
selected countries, the width of the boxes is proportional to
the square roots of the number of companies. 22
2.1 Histogram (top) and boxplot (bottom) of malignant melanoma
mortality rates. 30
2.2 Parallel boxplots of malignant melanoma mortality rates by
contiguity to an ocean. 31
2.3 Estimated densities of malignant melanoma mortality rates
by contiguity to an ocean. 32
2.4 Scatterplot of malignant melanoma mortality rates by geographical
location. 33
2.5 Scatterplot of malignant melanoma mortality rates against
latitude. 34
2.6 Bar chart of happiness. 35
2.7 Spineplot of health status and happiness. 36
2.8 Spinogram (left) and conditional density plot (right) of
happiness depending on log-income 38
3.1 Boxplots of estimates of room width in feet and metres (after
conversion to feet) and normal probability plots of estimates
of room width made in feet and in metres. 55
3.2 R output of the independent samples t-test for the roomwidth
data. 56
3.3 R output of the independent samples Welch test for the
roomwidth data. 56
3.4 R output of the Wilcoxon rank sum test for the roomwidth
data. 57
3.5 Boxplot and normal probability plot for differences between
the two mooring methods. 58
? 2010 by Taylor and Francis Group, LLC
3.6 R output of the paired t-test for the waves data. 59
3.7 R output of the Wilcoxon signed rank test for the waves
data. 59
3.8 Enhanced scatterplot of water hardness and mortality,
showing both the joint and the marginal distributions and,
in addition, the location of the city by different plotting
symbols. 60
3.9 R output of Pearsons’ correlation coefficient for the water
data. 61
3.10 R output of the chi-squared test for the pistonrings data. 61
3.11 Association plot of the residuals for the pistonrings data. 62
3.12 R output of McNemar’s test for the rearrests data. 63
3.13 R output of an exact version of McNemar’s test for the
rearrests data computed via a binomial test. 63
4.1 An approximation for the conditional distribution of the
difference of mean roomwidth estimates in the feet and
metres group under the null hypothesis. The vertical lines
show the negative and positive absolute value of the test
statistic T obtained from the original data. 71



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