5.2. Calculating the Standard Deviation http://www.ck12.org
From the list, you can see that the mean of the marks is 61 and the standard deviation is15.6.
To use technology to calculate the variance involves naming the lists according to the operations that you need to do
to determine the correct values. As well, you can use the 2ndcatalogue function of the calculator to determine the
sum of the squared variations. All of the same steps used to calculate the standard deviation of the data are applied
to give the mean of the data set. You could use the 2ndcatalogue function to find the mean of the data, but since you
are now familiar with 1-Var Stats, you may as well use this method.
The mean of the data is 61.L 2 will now be renamedL 1 -61 to compute the values for(x−x ̄).
Likewise,L 3 will be renamed(L 2 )^2.