Formulas and Functions

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Presentation transcript:

Formulas and Functions Formulas are equations that perform calculations in your spreadsheet. Formulas always begin with an equals sign (=). When you enter an equals sign into a cell, you are basically telling Excel to “calculate this.” Functions are Excel-defined formulas. They take data you select and enter, perform calculations on them, and return value(s).

More on Functions All functions have a common format – the equals sign followed by the function name followed by the input in parentheses. The input for a function can be either: A set of numbers (e.g., “=AVERAGE(2, 3, 4, 5)”) This tells Excel to calculate the average of these numbers. A reference to cell(s) (e.g., “=AVERAGE(B1:B18) or “=AVERAGE (B1, B2, B3, B4, B5, B6, B7, B8)” This tells Excel to calculate the average of the data that appear in all the cells from B1 to B8. You can either type these cell references in by hand or by clicking and dragging with your mouse to select the cells.

Functions for Descriptive Statistics Below are several functions you will need to learn for this class. Try them out with the practice data set. =AVERAGE(first cell:last cell): calculates the mean =MEDIAN(first cell:last cell): calculates the median =MODE(first cell:last cell): calculates the mode =VARP(first cell:last cell): calculates the variance =STDEVP(first cell:last cell): calculates the standard deviation You may directly write the functions for these statistics into cells or the formula bar, OR You may use the function wizard ( in the toolbar)

Functions for Descriptive Statistics Your Excel spreadsheet should now look like this: