There are specific quick functions in Excel that can offer you the statistics of your worksheet without using formulas such as Status Bar quick functions.
See the Figure given below, as soon as you select the preferred series you will get the figures in the status bar, the average of numbers, the number of cells that contain values and the sum of numbers.
By a right click on the status bar you can customize it. You can add extra functions in the status bar. Choose the function from the menu which you need to add in the status bar.