Social & Preventive Medicine Biostatistics 7085c624 True about bell's curve is - A It skewed to the left B Has mean =1[?]0 C Has standard deviation = 0[?]0 D Has variance =1[?]0 High-Yield Explanation Ans. is 'd' i.e., Has variance =1.0 Standard normal curve (Bell curve or Gaussian distribution) has been explained in previous sessions.