Interpretation and Uses of Medical Statistics

age group age-group arithmetic mean average birth British Medical Journal calculated calendar period central value cholesterol Chronic glomerulonephritis class intervals cohort confidence interval confidence limits control group curve described determine drawn Editor estimate Example 2.2 explained frequency distribution frequency polygon glomerulonephritis group of patients histogram hypothesis were true Irishmen 21 logarithmic scale males Malignant hypertension Malignant hypertension Chronic maternal height mean birth-weight mean cholesterol level mean will lie measure of central measure of dispersion measure of skewness median method mode mortality rate normal distribution null hypothesis number of observations parent population particular percentile population mean population parameters population with mean quartile range reader regression equation regression line relationship repeated samples Reprinted sample means sample of 100 sample statistics sample variance sampling distribution scatter diagram selected significantly different simple random sample standard deviation standard error Table abbreviated tests of significance tion total number tracheostomies variables variation X₁