Guide to Using Excel 2007 For Basic Statistical Applications To Accompany Business Statistics: A Decision Making Approach, 7th Ed. Chapter 3: Describing Data Using Numerical Measures By Groebner, Shannon, Fry, & Smith Prentice-Hall Publishing Company Copyright, 2008

Empirical Rule - Burger N’ Brew Issue: Analyze the Phoenix Burger Sales Distribution Objective: Use Excel 2007 to compute graphs and numerical measures necessary for using the empirical rule to analyze sales at Burger N’ Brew Data file is BurgerNBrew.xls

Empirical Rule – Burger N’ Brew Open the data file called BurgerNBrew.xls. The file contains data for 365 days

Empirical Rule – Burger N’ Brew First develop histogram – Class width = 2. Form bins

Empirical Rule – Burger N’ Brew Select the Data Tab Select Data Analysis Select Histogram OK

Empirical Rule – Burger N’ Brew Input Range- Chilli-Burgers Sold Bin Range – the Bins just created Select New Worksheet Ply Select Chart Output OK

Empirical Rule – Burger N’ Brew This is the default output – now to reformat the Histogram a bit

Empirical Rule – Burger N’ Brew Looks better? Now to compute the statistics

Empirical Rule – Burger N’ Brew Select the Data Tab Select Data Analysis Select Descriptive Statistics OK

Empirical Rule – Burger N’ Brew Input Range is the column to be analyzed Select New Workbook Select Summary Statistics

Empirical Rule – Burger N’ Brew And the statistics are: The Empirical rule tells us – 68% falls between / (68%) sold between 12 (12.0) and 18 (18.2) 95% falls between /- 2(3.13) 99% falls between /- 3(3.13)