If the population standard deviation is known and the sample size is large enough, the normal distribution should be used for better results. A t-distribution is a probability distribution similar ...

However, there are drawbacks to normal probability and it can be difficult to determine whether or not a sample truly follows ...

The calculator shows the area in grey, and returns the probability represented by the area ... using simulated fish length data which is assumed to come from a normal distribution. Users can choose ...

Julie Young is an experienced financial writer and editor. She specializes in financial analysis in capital planning and investment management. Suzanne is a content marketer, writer, and fact-checker.

Normal probability distribution is assumed in financial models; however, the returns of many securities tend to demonstrate a non-normal distribution. For example, some distributions are skewed ...