How would you apply a percentile calculation in Tableau?

Using the PERCENTILE() function in a calculated field is the correct approach for applying a percentile calculation in Tableau. This function allows you to determine the value below which a given percentage of observations fall, providing insights into the data distribution. By incorporating the PERCENTILE() function, users can easily specify the percentile they are interested in (for example, the 25th, 50th, or 75th percentile) and compute the corresponding value from their dataset.

In contrast, while the MEDIAN() function does calculate the midpoint of a dataset, it specifically returns the 50th percentile and does not allow for flexibility in determining other percentiles. The COUNT() function is used to count the number of occurrences of items in a dataset, which is unrelated to percentile calculations. Lastly, the AVG() function calculates the average of selected data points, which also does not provide the necessary information for determining percentiles. Therefore, the PERCENTILE() function is the appropriate choice for calculating and analyzing percentiles accurately in Tableau.