Range Calculation: Subtract the smallest value from the largest value in the dataset to find the range.

Number of Classes: Decide on the number of classes (commonly between 5 and 20) based on the dataset size and desired detail.

Class Width: Divide the range by the number of classes to calculate the class width. It's often rounded up to a convenient number.

Define Intervals: Start with the lowest value and create intervals using the calculated width, ensuring that each interval is mutually exclusive and covers the entire range of data.