Quartiles and Percentiles Worksheets

What Are Quartiles and Percentiles in Statistics? Percentile is not a term strictly related to statistics; we use percentiles in our everyday life. We use percentile to better understand the health indicators, test scores, and other measurements that we make on a regular basis. In statistics, percentiles are used to interpret and understand a set of data. The nth percentile is the value below which a percentage of data in a data is present. For instance, a 20 years old male measuring six feet height lies in the 89th percentile for this height. It means of all the 20 years old male; 89 percent measures equal to or less than six feet. In statistics, we use quartiles to group summarize the set of numbers. Typically, we use five numbers to make up quartiles. Quartiles are the group of five numbers that we use to break a data set into four groups. The five numbers are listed below: Minimum or the 0th percentile, it is known as the smallest number in the group. 1st quartile or the 25th percentile, it is the number that splits the lowest 25th of the group from the highest 75th. Median or the 50th percentile, it is the number present in the middle of the group. 3rd quartile or the 75th percentile, it is the number that separates the lowest 75th of the group from the highest 25th of the group. Maximum or the 100th percentile, it is the largest number.