<prompt> Which statement is TRUE about Standard normal distribution curve :Mean -1, standard deviation - zeroStandard deviation 1, mean-zeroCurve skews towards leftCurve skews towards right  <response>: Ans. is b ie Standard deviation 1 mean is 0 Standard Normal Curveis based on infinitely large no of observationsit is smooth, bell shaped, perfectly symmetrical curve, it does not skew either to the right or left side.the total area of the curve is 1Mean is O, Standard deviation is 1Mean, median, mode all coincide 