Area falling under 2 S.D. curve would be around -
Ref: Parks 23rd edition pg 848 The several measures of variation or dispersion of which the following are widely known : RangeThe mean or Average detion The standard detion . Ref:Parks 23rd edition pg 849. 1SD : confidence limit = 68% 2SD : confidence limit = 95% 3SD : confidence limit = 99.7%
66%
95%
57%
99%
Biostatistics