Windows 7

# Microsoft Excel 2010 : Building More Powerful Worksheets - Using Math Functions & Using Statistical Functions

8/13/2011 4:52:22 PM
You can use math & trigonometry functions to help you perform mathematical calculations. You can use formulas for calculations, such as SQRT (Square root) or TAN (Tangent); formulas for conversion, such as DEGREES (radians to Degrees), or RADIANS (degrees to Radians); or formulas for rounding, such as FLOOR (number down, toward zero), CEILING (number up, towards nearest integer), INT (number down to nearest integer), or ROUND (number to a specific number of digits). You can also use the RAND function to generate random real numbers between 0 and 1, which you can use in an equation to create other random numbers, such as =RAND()*100—creates random numbers between 0 and 100. Many of the math functions use the following arguments: number, significance, and angle. Significance is the multiple to which you want to round.

#### Use Math & Trig Functions

Click the cell where you want to place the function.

Type = (equal sign), type a text function, specify the argument for the selected function, and then press Enter.

Some syntax examples include:

• =FLOOR(number, significance)

• =CEILING(number, significance)

• =INT(number)

• =INT(number, num_digits)

• =DEGREES(angle)

• =SQRT(number)

• =TAN(number)

• =RAND()

Or click the Formulas tab, click the Math & Trig button, click a function, specify the function arguments, and then click OK.

### Using Statistical Functions

You can use statistical functions to help you perform analysis on a group of numbers. You can use formulas to find information, such as MAX or MIN (maximum or minimum value in a list), MEDIAN (median of given numbers), COUNT (number of items in a list), STDEV.S (standard deviation based on a sample) (New!), STDEV.P (standard deviation based on the entire population) (New!), SKEW (skewness of the distribution), or KURT (kurtosis of a data set).

#### Use Statistical Functions

Click the cell where you want to place the function.

Type = (equal sign), type a text function, specify the argument for the selected function, and then press Enter.

Some syntax examples include:

• =MAX(number1, number2, ...)

• =MIN(number1, number2, ...)

• =MEDIAN(number1, number2, ...)

• =COUNT(value1, value2, ...)

• =STDEV.S(number1, number2, ...)

• =STDEV.P(number1, number2, ...)

• =SKEW(number1, number2, ...)

• =KURT(number1, number2, ...)

Or click the Formulas tab, click the More Functions button, point to Statistical, click a function, specify the function arguments, and then click OK.