In a normal surve, what percent of the values will be included in the area between two standard detions on either side of the mean (x+- ....) ?: (A) 68.3, (B) 90.4, (C) 95.4, (D) 99.7
Answer is C. <p> 95.4%. Reference:Park&;s textbook of preventive and social medicine,K.Park,23rd edition,page no:849. <\p>