797K views 3 years ago. Coefficient of variation for grouped data Let x i f i i 1 2 n be given frequency distribution. How To Find The Mean Variance And Standard Deviation Of A Frequency Grouped Data Table In 2022 Standard Deviation Data Table Data Prepare a frequency distribution with appropriate class intervals and write the corresponding frequency f. . Remember variance and standard devia on are based on find- ing the average. M midpoint of the class. The following tutorials explain how to perform other common operations. For each class interval calculate the class mark x by using the formula. Eg the standard deviation of the data in the. When the data has not been placed in any categories and no aggregationsummarization has taken placed on the data then it is known as ungrouped data. Here we consider the first data that is class interval as x and no of frequency as f. The variance is a measure of how mu