## Where is the CV on a calculator?

Calculator solution Use the syntax: stdev(A)/avg(A) 100 to find the CV of data set A and stdev(B)/avg(B) 100 to find the CV of data set B. Note: If the data set represents a population of values, use stdevp for the standard deviation.

**What is the symbol for standard deviation?**

sigma σ

**What is the formula for average standard deviation in Excel?**

Standard deviation is a measure of how much variance there is in a set of numbers compared to the average (mean) of the numbers. To calculate standard deviation in Excel, you can use one of two primary functions, depending on the data set. If the data represents the entire population, you can use the STDEV. P function.

### How do I calculate the sample mean?

The following steps will show you how to calculate the sample mean of a data set:Add up the sample items.Divide sum by the number of samples.The result is the mean.Use the mean to find the variance.Use the variance to find the standard deviation.

**What is the equation for sample mean?**

The formula to find the sample mean is: = ( Σ xi ) / n. All that formula is saying is add up all of the numbers in your data set ( Σ means “add up” and xi means “all the numbers in the data set).