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Chapter 7: Comparing two groups using STATA

Figure 7.1 Histogram of two groups on one graph

Figure 7.1 Histogram of two groups on one graph

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Figure 7.2 Two pannel or overlapping density plots for two groups

Figure 7.2

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Figure 7.3 Box and whisker plot for a continuous variable in two groups

Figure 7.3

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Figure 7.4 Violin plot for a continuous variable comparing two groups

Figure 7.4

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Figure 7.5 Dot plot for a continuous variable comparing two groups

Figure 7.5 Scatterplot for a continuous variable comparing two groups

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Figure 7.6 Histogram of a variable to check for normality

Figure 7.6 Code

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Figure 7.7 Output for an unpaired t-test

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Figure 7.8 Histograms of a skewed variable before and after log transformation

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Figure 7.9 Output for back transforming t-test data

Box 7.4 Presenting the findings of a t-test on log-transformed data

Figure 7.9 Code and Box 7.4

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Figure 7.10 Table of data for and output from a Mann-Whitney U test

Figure 7.10 Code

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Figure 7.11 Output for chi-square test relative risk and risk difference

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Figure 7.12 Output for odds ratio

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Table 7.1 Presenting ordered proportions

Table 7.1 Code

Code for Table 7.1 Presenting ordered proportions

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