But do you know how to insert a sum without typing the formula? Have you struggled to start a new line of text within a cell? Well, you need to learn these less popular but extremely useful shortcuts.

1. Click the cell under a column of numbers you want to add. Or, if you want to sum a row of numbers, click the cell to the right of the series. 2. On the Home tab, click the AutoSum button (which ...

To calculate the sum of squares, subtract the mean from the data points, square the differences, and add them together. There are three types of sum of squares: total, residual, and regression.