Up next in Intermediate Math Skills (21 videos)
Brush up on your math with these tutorials.
You Will Need
- Set of data
- Basic math computation skills
- Graphing calculator
Find the sum of the numbers
Add all of the numbers together to find the sum.
Divide the sum
Divide the sum of the data by the number of values in the set to find the mean, or average.
Subtract the mean from each value
Subtract the mean, or average, from each value in the data set and then square the difference, or multiply the result by itself.
Add the squared results
Add all of the squared results together using a graphing calculator.
Divide by the number of values
Divide by the number of values in the data set. This will give you the variance of the data. Use this value to compare variances, make predictions, and show off how well you analyzed the data.