This document discusses normal distributions and properties of the normal probability curve. It is presented by Suresh Babu G, an assistant professor. The normal distribution is a bell-shaped, symmetric curve where most values cluster around the mean. It has important uses in education and psychology for relating mean, standard deviation, and percentiles. The document also discusses how distributions can diverge from normality through skewness, where the mean and median are not in the center, and through kurtosis, where a distribution is more or less peaked than the normal curve.