### Unit 10 - Excel statistical functions

As an administrative assistant, you may frequently use Excel for various data-related tasks. Here are essential Excel statistical functions that can be particularly useful for administrative tasks:

__1. AVERAGE:__

The AVERAGE function calculates the average (mean) of a range of numbers, which can be helpful for determining typical values.

** Syntax: **=AVERAGE(number1, [number2], ...)

Example: Suppose you have a list of monthly expenses in cells A1:A10. To calculate the average monthly expense, you can use the formula =AVERAGE(A1:A10).

__2. COUNT:__

The COUNT function counts the number of cells that contain numbers within a specified range, helping you understand the size of your dataset.

** Syntax: **=COUNT(value1, [value2], ...)

Example: If you want to count the number of sales transactions in a list (cells B1:B100), you can use the formula =COUNT(B1:B100).

__3. MAX and MIN:__

The MAX and MIN functions return the highest and lowest values in a range, respectively, allowing you to identify extremes in your data.

** Syntax (MAX):** =MAX(number1, [number2], ...)

** Syntax (MIN):** =MIN(number1, [number2], ...)

Example: To find the highest and lowest sales amounts in a dataset (cells C1:C50), you can use =MAX(C1:C50) and =MIN(C1:C50), respectively.

__4. STDEV:__

The STDEV function calculates the standard deviation of a dataset, providing a measure of the dispersion of values from the mean.

*Syntax:** *=STDEV(number1, [number2], ...)

Example: If you want to assess the variability of monthly sales figures (cells D1:D12), you can use the formula =STDEV(D1:D12).

__5. MEDIAN:__

The MEDIAN function returns the middle value in a dataset when arranged in ascending order, offering a robust measure of central tendency.

** Syntax:** =MEDIAN(number1, [number2], ...)

Example: To find the median income in a list of salaries (cells E1:E20), you can use =MEDIAN(E1:E20).

__6. COUNTIF:__

The COUNTIF function counts the number of cells that meet a specified condition, allowing you to analyze data based on specific criteria.

** Syntax:** =COUNTIF(range, criteria)

Example: If you want to count the number of sales transactions above $1000 in a list (cells F1:F100), you can use =COUNTIF(F1:F100, ">1000").

__7. RANK:__

The RANK function assigns a rank to a value in a dataset, providing insight into its relative position compared to other values.

** Syntax:** =RANK(number, ref, [order])

Example: To rank sales figures in descending order (cells G1:G50), you can use =RANK(G1, $G$1:$G$50, 0).

These Excel statistical functions can help you analyze and interpret data efficiently, enabling you to support decision-making processes and streamline administrative tasks effectively.

### Assignment

As an administrative assistant at a retail company, you are responsible for analyzing monthly sales data to track performance and identify trends.

This dataset represents monthly sales figures for a company over a one-year period, with each row containing the month and corresponding sales amount. Use this dataset to analyzing sales data by creating an additional columns to clearly show each of the 7 functions from the tutorial.

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