Calculate Arithmetic mean by the "Assumed mean" method

Simple Arithmetic Mean

Calculate the aritmetic mean by (a) assumed mean and (b) step deviation methods

Calculate the aritmetic mean by (a) assumed mean and (b) step deviation methods

Find the mean by assumed mean method.

Find the mean by assumed mean method.

Marks of 12 students in a unit test are given as 4, 21, 13, 17, 5, 9, 10, 20, 19, 12, 20, 14, Assume a mean and calculate the arithmetic mean of the data. Assume another number as mean and calculate the arithmetic mean again. Do you get the same result? Comment.

Write the formula for calculating 'Arithmetic mean'. In step deivation method and explain each letter in it.

Solve example 3 by the assumed mean method .

Weighted Arithmetic Mean