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The Aim of the Statistical Method
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age-groups answer arithmetic mean association average births calculated cancer causes characteristics clearly Coefficient of Variation colds column common cold compared comparison control group death-rate difference disease drug England and Wales equal example expected number expected values experience exposed to risk fact factors fatality-rate females figures frequency distribution give given hospital hypothesis illness incidence individuals infant mortality-rate inoculated instance intelligence group large number Large Towns males measure median method normal null hypothesis number of children number of deaths number of observations number of patients number of persons nutrition occur by chance pairs particular percentage placebo population problem procedure proportion question random sample ratio recorded relatively respiratory tuberculosis Rural Districts scatter diagram shown small numbers specific squared deviations standard deviation standard error standard rates standardised statistical stillbirth Table temperature test of significance tion total number treated treatment tuberculosis uninoculated universe vaccine variability
Statistics in Biology & Psychology
Limited preview - 1980
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