I describe the standard normal distribution and its properties with respect to the percentage of observations within each standard deviation. I also make reference to two key statistical demarcation points (i.e., 1.96 and 2.58) and their relationship to the normal distribution. Finally, I mention two tests that can be used to test normal distributions for statistical significance. normal distribution, normal probability distribution, standard normal distribution, normal distribution curve, bell

The normal distribution, often called the bell curve, is one of the most important concepts in statistics and probability theory. It describes how data tends to be distributed around a central value, with most observations clustering near the mean and fewer appearing as you move further away. The curve is symmetrical, meaning the left and right sides are mirror images of each other. The spread of the distribution is measured by the standard deviation: a smaller standard deviation means the data