Final answer:
The sample variance is represented by the notation s^2. It measures the variability of data values in a sample.
Step-by-step explanation:
The sample variance is represented by the notation s^2. It is a measure of how much the data values in a sample vary from the mean. To calculate the sample variance, you need to subtract the mean from each data value, square the result, sum up all the squared differences, and divide by the number of data points minus one.