Z-Scores and the Standard Normal Distribution

Log-normal distribution In probability theory, a log-normal distribution is a continuous probability distribution of a random variable whose

Normal Distribution · mean = median = mode · symmetry about the center · 50% of values less than the mean and 50% greater than the mean

normalization The zero-argument form NormalDistribution and is sometimes called the standard normal distribution Due to the

new normal A standard normal distribution has a mean of 0 and standard deviation of 1 This is also known as the z distribution You may see the notation (N(mu, sigma