Biostatistics with R/The Chi-Square Distribution and the Analysis of Frequencies

Summary of Formulars with R Formular Number Name Formular Formular with R 12.2.1 Standard normal random variable Example Example 12.2.2 Chi-square distribution with n degrees of freedom Example Example 12.2.3 Chi-square probability density function Example Example 12.2.4 Chi-square test statistic Example Example 12.4.1 Chi-square calculation formula for a 2 Â 2 contingency table Example Example 12.4.2 Yates’s corrected chi-square calculation for a 2 Â 2 contingency table Example Example 12.6.1–12.6.2 Large-sample approximation to the chi-square Example Example 12.7.1 Relative risk estimate Example Example 12.7.2 Confidence interval for the relative risk estimate Example Example 12.7.3 Odds ratio estimate Example Example 12.7.4 Confidence interval for the odds ratio estimate Example Example 12.7.5 Expected frequency in the Mantel–Haenszel statistic Example Example 12.7.6 Stratum expected frequency in the Mantel–Haenszel statistic Example Example 12.7.7 Mantel–Haenszel test statistic Example Example 12.7.8 Mantel–Haenszel estimator of the common odds ratio Example Example Example Example Example Example Example Example Example Example Symbol Key