Answer:A. Data values are treated as if they occur at the midpoint of a class
Explanation:Descriptive statistics is the process of describing or showing or summarising data in order to make it simple and easy to analyse or evaluate or draw conclusions from it. Descriptive statistics can be broadly categorized into four different categories which includes the following
Measurements of Frequency: such as Percent, Frequency. Etc
Measurements of Central Tendency. Mean, Median, and Mode.
Measurements of Dispersion such as Range, Variance, Standard Deviation.
Measurements of Position such as Quartile Ranks. Etc.
In computing,Descriptive statistics of grouped data values are treated as if they occur at the midpoint of a class.