Arithmetic mean
The mean shares the total equally: add everything and divide by the count. That is how you get average monthly spending or a final grade.
About: Arithmetic mean
The mean shares the total equally: add everything and divide by the count. That is how you get average monthly spending or a final grade.
Worked examples
What is the mean of: 42; 42; 36; 20?
Answer: 35. Add the values (140) and divide by how many there are (4): 140 ÷ 4 = 35.
What is the mean of: 30; 47; 39; 37; 29; 16?
Answer: 33. Add the values (198) and divide by how many there are (6): 198 ÷ 6 = 33.
What is the mean of: 81; 78; 97; 93; 81?
Answer: 86. Add the values (430) and divide by how many there are (5): 430 ÷ 5 = 86.