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The Lady Tasting Tea: How Statistics Revolutionized Science in the Twentieth ...
No preview available - 2002
50 per cent a-level analysis of variance analyzed applied assessment articles assignment authors bias calculated cancer captopril carboxyhemoglobin Chapter chi-square classification clinical trials compared comparisons confidence interval considered contingency tables control group correlation covariates criteria cross-sectional detect discussed disease drug editors effects Engl Engl J Med England Journal error estimate evaluation example Figure group means identified important included infarction inference infinite data insulin interpretation investigators Journal of Medicine Mann-Whitney test measure ment Minitab Mosteller F multiple myocardial infarction N Engl null hypothesis observed ordered categories Original Articles outcome papers patients peer review Ph.D placebo plot population probability problems procedure published questions randomized controlled trial readers References regression line residuals risk sample scientific scores somatostatin specific standard deviation statistical analysis statistical methods statistically significant statistician subjects t-test Table techniques therapy tion tistical treat treatment groups two-sided validity variables