Question

Arithmetic mean for grouped data can be calculated by _________.

• A. direct method
• B. assumed mean method
• C. step deviation method
• D. all of the above

Answer 1

Answer: (D)

all of the above

Arithmetic mean refers to the average amount in a given group of data. There are many ways to calculate arithmetic mean like direct method where all the data are added up and then divided by the number of figures in the data in order to ascertain the mean class or assumed mean method and step deviation method, the data of the given class is reduced into smaller units which makes it easy to do calculation and ascertain the mean of the class.