Write the next sentence in this paragraph:

How to calculate standard deviation 
Look at your data set. 
This is an important step in any type of statistical calculation, even if it is a simple figure like the mean or median. 
Know how many numbers are in your sample.

Select from the following. (I). This is the most important scale determining the standard deviation: square of males in a 10's grade. 99.5 or above equals 9, making the standard deviation as figures. (II). Do the numbers vary across a large range? Or are the differences between the numbers small, such as just a few decimal places? Know what type of data you are looking at. What do your numbers in your sample represent? This could be something like test scores, heart rate readings, height, weight etc. (III). This will help you using a secondary factor like your own statistical scale. Determine your population, large population (individuals with multiple families) or the population range (individuals with small, preferably younger relatives) of your citizens and local businesses. (IV). In this example, total deviation is 80 %. The average deviation is listed as 40%, and that means that 80% is the average.
(II).