Simple arithmetic mean is also known only as mean. It is the most widely used and most intuitive position measurement of all. It is so present in our daily lives that anyone understands its meaning and uses it often.
The average of a set of numeric values is calculated adding up all these values and dividing the result by number of elements added, which is equal to the number of elements in the set, ie the average of no numbers is their sum divided by no.
Marcos took four mathematics tests during the year. Your grades were:
1st test = 6.0
2nd test = 7.0
3rd test = 9.0
4th test = 8.0
To find the simple arithmetic mean, we add the grades and divide by 4, which is the number of tests performed:
Therefore, Mark's average grade was 7.5.Next: Weighted Average