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A grouping system is a type comprising a correlated activity that integrates any number of members of the subset to generate a factor of the range, with a self - concept and an exact opposite for each component.

Cut-point grouping with equal width classes was used to organise a quantitative data set.

The difference between the higher and lower cut-points is the common class width.

As a result, the most common class width is $10$.

A grouping system is a type comprising a correlated activity that integrates any number of members of the subset to generate a factor of the range, with a self - concept and an exact opposite for each component.

The average of the cut-points is the midpoints.

The second class's lower and upper cut-points are $15$and $25$, respectively. The average of the cut-points is the midpoints.

As a result, the cut-points average is $20$.

A grouping system is a type comprising a correlated activity that integrates any number of members of the subset to generate a factor of the range, with a self - concept and an exact opposite for each component.

The average of the lower and upper bounds is the class mark.

The lower cut-point is equal to the previous class's upper cut-point, and the upper cut-point is equal to the lower cut-point multiplied by the class width.

As a result, the lower and upper cut-points are respectively $25$and $35$.

A grouping system is a type comprising a correlated activity that integrates any number of members of the subset to generate a factor of the range, with a self - concept and an exact opposite for each component.

A class's lower class limit is the smallest data value that can be stored in the class.

Because the observation of $32.4$does not fall between the lower and upper bounds of the second class, it is placed in the third class.

As a result, the observation of $32.4$is in third class.