## Understanding Medical Statistics |

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age group age specific Appendix 3e average calculated chapter chi-squared coefficient of determination coefficient of simple column confidence interval correct costs death rate decubiti degrees of freedom dependent variable diagram difference disability disease doctor estimated example expected explanatory variables factors fertility rate formula frequency histogram hospital incorrect diagnosis incorrect treatment judgement sample length of stay live births measure median midwives multicollinearity multiple regression normal distribution null hypothesis number of deaths number of patients number of points observations obtained occupied beds P(incorrect pairs particular patients on treatment point prevalence possible predicted probability proportion random sample rank correlation rank order ratio regression analysis regression line regression slope sample mean sampling error scatter diagram scatter graph score significance level simple correlation simple random sample square root squared deviations standard deviation standard error stillbirth sum of squares Suppose tion trial usually variance variation weight