How to find sample variance

A sample is a subset of a bigger population of data. The sample mean formula is used to get the average value of a set of sample data.

Sample mean vs mean

It is defined as the average of the sample’s measurements. If the sample is chosen at random, the sample mean may be used to calculate the population mean. It represents the assessment of the data center and is used to determine the mean of any population.

Sample Mean Definition

The sample mean is a measure of central tendency that represents the average value of a sample.

It’s calculated by summing all the observed values and then dividing by the number of observations in the sample. The sample mean formula is shown in the image added below:

Sample Mean Formula

Sample mean for a data set is defined as the sum of all the terms divided by the total number of terms.

It is denoted by the symbol x̄ and is calculated using the formula:

x̄ = Σx_i / n

where,

• Σx_i is Sum of Terms in the Sample
• n is Number of Terms in Sample

Key Points

• The sample mean provides a sin
  how to find sample mean without data set
  how to find mean in statistics example