Symmetrical Distribution is a type of data distribution in which the sample data set is split into two parts which produces a mirror image of each other. It is used in many branches of mathematics, statistics, and finance.

It's commonly represented as a bell curve and is used to calculate mean, median, and mode of data. Symmetrical distribution is important because it helps find the relationship between two or more variables. It is also used to measure how much of a particular element or variable is present in a particular population.

In mathematics, a symmetrical distribution simplifies calculations. It's often considered the foundation for a distribution and is helpful in recognizing other related distributions like the normal distribution. It also helps in developing hypotheses and assigning probabilities.

In statistics, a symmetrical distribution helps make inferences about the population from which the data is drawn. This is done by measuring the skewness, or the degree to which the data deviates from the mean. This information helps people make better decisions, such as the best marketing techniques or which products to offer in their stores.

In finance, symmetrical distributions are used in pricing decisions. Financial advisors may use them to identify whether an asset's price will increase or decrease in the future. Symmetrical distributions also help traders and investors identify possible entry and exit points.

Real-world data, however, often has asymmetrical qualities. For example, stock prices tend to exhibit right-skewness which means they climb, but rarely reach the heights of the tallest peak in a bell curve. That is why financial advisors often use right-skewed distributions like the Gamma distribution to better describe real-world price data.

Symmetrical distributions are useful in many fields, including mathematics, statistics, and finance. They can help to make accurate predictions about population characteristics and inform decisions about pricing and investments. However, it's important to remember that real-world data can behave differently from a perfectly symmetrical distribution, so it pays to be aware of asymmetrical qualities when dealing with them.