Explain the Aggregate Function ' AVG ' in Tableau with Example?

 In Tableau, the "AVG" aggregate function is used to calculate the average (mean) of a numeric field or expression. It computes the sum of all values and divides it by the count of values to determine the average value.

The syntax of the "AVG" function in Tableau is as follows:

AVG(expression)

Here's an example to illustrate how the "AVG" function works in Tableau:

Suppose you have a dataset of students and their test scores. You want to calculate the average score of the students.

AVG([Test Score])

In this example, the "AVG" function is used to evaluate the expression [Test Score]. It adds up all the test scores and divides the sum by the count of test scores to calculate the average score.

For instance, if the test scores of the students are [80, 90, 70, 85, 95], the "AVG" function will calculate the average as (80 + 90 + 70 + 85 + 95) / 5 = 84.

The "AVG" function is useful for understanding the central tendency of a numeric field or expression. It provides insights into the average value of a dataset and helps in comparing individual values to the overall average. The function is commonly used in statistical analysis, performance tracking, and understanding data distributions.

You can also combine the "AVG" function with other calculations or conditions to further analyze your data. For example, you can calculate the average score for each group or filter the data based on certain criteria before applying the "AVG" function.

By utilizing the "AVG" function in Tableau, you can easily obtain the average value of a numeric field or expression, facilitating data analysis and visualizations.