Sample Mean Formula
Before going to learn the sample mean formula, let us recall what is the sample mean. Sample mean represents the measure of the center of the data. Any population's mean is estimated using the sample mean. In many of the situations and cases, we are required to estimate what the whole population is doing, or what all are the factors going throughout the population, without surveying everyone in the population. In such cases sample mean is useful. An average value found in a sample is termed the sample mean. Let us see the sample mean formula and its applications in the upcoming sections.
What Is Sample Mean Formula?
The sample mean formula of the given data can be expressed as the ratio of the sum of terms to the number of terms. i.e.,
Sample Mean= (Sum of terms)/(Number of terms)
Sample Mean =(∑x\(_i\) )/n=(x\(_1\)+x\(_2\)+x\(_3\)+⋯+x\(_n\))/n
Where,
 ∑x\(_i\)= sum of terms
 n = number of terms
Let us see the applications of the sample mean formula in the section below.

Example 1: Find the sample mean of 60, 57, 109, 50.
Solution:
To find: Sample mean
Sum of terms = 60 + 57 + 109 + 50 = 276
Number of terms = 4
Using sample mean formula,
mean = (sum of terms)/(number of terms)
mean = 276/4
= 69
Answer: The sample mean of 60, 57, 109, 50 is 69.

Example 2: Five friends having heights of 110 units, 115 units, 109 units, 112 units, and 114 units respectively. Find their sample mean height.
Solution:
To find: Sample mean height
Sum of all heights = 110 + 115 + 109 + 112 + 114 = 560
Number of person = 5Using sample mean formula,
mean = (sum of terms)/(number of terms)
mean =560/5
= 112 unitsAnswer: The sample mean height of five friends is 112 units.