Guide to Using Excel 2007 For Basic Statistical Applications

Guide to Using Excel 2007 For Basic Statistical Applications
To Accompany Business Statistics: A Decision Making Approach, 7th Ed. Chapter 2: Graphs, Charts and Tables - Describing Your Data By Groebner, Shannon, Fry, & Smith Prentice-Hall Publishing Company Copyright, 2008

Chapter 2 Excel Examples
Frequency Distributions - Athletic Shoe Survey Histograms- Capital Credit Union Joint Frequency Distributions- Joint Relative Frequencies- More Examples

Chapter 2 Excel Examples (continued)
Bar Charts- Bach, Lombard & Wilson Line Charts- McGregor Vineyards Scatter Diagrams- Personal Computers

Frequency Distributions Athletic Shoe Survey
Issue: Analyze the data from a survey of 100 college students regarding the number of Nike shoes they own. Objective: Use Excel 2007 to develop a frequency distribution for the number of Nike shoes owned by college students. Data File is SportShoes.xls

Frequency Distributions-Athletic Shoe Survey
Open the Excel file called SportShoes.xls File contains 100 observations – Last row is 102 – Column E contains the Number of Nike Shoes Owned

Enter Possible number of shoes owned

Select the area to receive the frequency

Select the Formulas Tab Select the indicated pull-down menu (More Functions button) Select Statistical Select Frequency

The Array containing “Number Nike” The Array containing the possible choices The Results are displayed Note: The function returns an additional result (The Zero)

Press Control, Shift and Enter Do Not press OK

And the results are:

Histograms Capital Credit Union
Issue: Analyze credit card balances for Capital Credit Union customers using a frequency distribution and histogram. Objective: Use Excel 2007 to develop a frequency distribution and histogram for credit card balances. Use ten class intervals. Data file is Capital.xls

Histograms-Capital Credit Union
Notice that this worksheet uses the R1C1 reference style for column and row labels. To change this to the standard reference style (A1), on the Office Button, click the Excel Options button, select Formulas, and then remove the check from the R1C1 reference style check box. Click OK. Open the Excel file “Capital.xls” The file contains 300 observations – The last row is 302 – Column 2 (B) contains the balances

Use Excel’s “Max” function to determine the largest value

Use Excel’s Min function to determine the smallest value

Compute Class Width Compute range as Maximum – Minimum Divide range by 10 to construct 10 classes – 1394 / 10 = Round up to $150.00 Intervals are: $90 to < $240 $240 to < $390 $390 to < $540 Etc…

Construct the Bins (The upper limits of each class

Select the Data tab Select Data Analysis Select Histogram OK

Input Range is Column B Bin Range is Column F – The range of Bins that you entered Select New Worksheet Ply Select Chart Output OK

Frequency legend This is Excel’s default output. It should be modified for most applications. The first change would be to delete the Frequency legend , change the Bins title to Balances and increase the size of the chart using the resize handles. Bins Title Sizing Handle

Excel’s default on a histogram is to include a More category
Excel’s default on a histogram is to include a More category. Remove the More category from the chart. Select the chart, right mouse click, Select Data, Edit Frequency. In the Edit Series dialog box, change Series Values to $B$11 rather than $B$12. Click OK.

Right click on any of the bars in the Histogram Select Format Data Series

Set Series Overlap and Gap Width to Zero to format the Histogram as shown

To put border colors around the bars of the histogram , select Border Color, Choose Solid line, Select the Color arrow, and Choose Dark Blue, Text 2 Theme Color.

Change the Bins categories to , , etc. and delete the More bins and frequency. Change the Histogram title to Credit Card Balances. See next slide for results of these changes.

Joint Frequency Distributions Capital Credit Union
Issue: Analyze the credit card balances by gender of the card holder. Objective: Use Excel 2007 to develop a joint frequency distribution for the credit card balances by gender. Data File is Capital.xls

Joint Frequency Distributions-Capital Credit Union
Open the Excel file called Capital.xls The file contains 300 observations. The last row is 301. Column 2 (B) contains the balances. Column 3 (C) contains the gender codes

\ Select Insert Select Pivot Table Table/Range selected automatically Place on New Worksheet 1. Place the cursor in any data cell

Drag Gender to the “Drop Column Fields Here” box Drag Gender to the “Drop Data Items Here” box Drag “Credit Card Account Balance” to the “Drop Row Fields Here”

Yielding! However we need to group the balance Information and change the Sum of Gender to Count of Gender

Place the cursor in any Balance Cell RIGHT click and select Group

Starting at: 90 Ending at: 1589 By: 150

Right click Sum of Gender Select Value Field Setting to Open Value Field Setting dialog box In dialog box, select Count

Complete!

Joint Relative Frequencies Capital Credit Union
Objective: Use Excel 2007 to develop a joint relative frequency distribution for the credit card balances by gender. Data File is Capital.xls Note: See Previous Example for Pivot Table Instructions.

Joint Relative Frequencies-Capital Credit Union
Right-mouse click anywhere in the values of the pivot table. Select Value Field Settings

Select the Show Values as tab Scroll down and click % of total

Now displayed as percentages rather than values

Bar Charts Bach, Lombard, & Wilson
Issue: An electronics company is being sued on the grounds that female new hires are paid less than male new hires. The law firm needs to analyze salary data to prepare the case. Objective: Use Excel 2007 to develop bar charts for the starting salary data for males and females. Data File is Bach.xls

Bar Charts-Bach, Lombard & Wilson
Open the Excel file called Bach.xls

Select data in columns B and C Select Insert Select Column

Select 2-D paired columns

Which brings up…

To change the horizontal axis labels to Years: Select Data Select Edit

Select cells A2 through A8 to display years in the label

Bar Charts- Bach, Lombard, & Wilson (continued)
Issue: An electronics company is being sued on the grounds that female new hires are paid less than male new hires. The law firm needs to analyze salary data to prepare the case. Objective: Use Excel 2007 to develop bar charts for the percent of males and females hired with MBA’s. Data File is Bach.xls

Select the Graph Select “Select Data”

Select Edit Select the data in Column A

Bar Charts- Bach, Lombard, & Wilson (continued)
Issue: An electronics company is being sued on the grounds that female new hires are paid less than male new hires. The law firm needs to analyze salary data to prepare the case. Objective: Use Excel 2007 to develop a bar chart for the average starting salary of males and females hired with and without MBA’s. Data File is Bach.xls

Select Columns G1 – J2 Select Insert Select Column

To add data labels to the top of the bars: Select Layout Tab Select Data Labels Select Outside End Delete the legend Series1

Line Charts- McGregor Vineyards
Issue: Analyze the sales and profits data over time. Objective: Use Excel 2007 to develop line charts for weekly sales and profits. Data File is McGregor.xls

Line Charts-McGregor Vineyards
Open the Excel file called McGregor.xls The file contains 20 weeks of historic data. The last row is 21

Select The data in Column B Select Insert Select Line Select the 2-D Line with Markers sample line chart

Need to: Change the title (Click title and replace with Sales Trend) Delete the legend Sales (dollars)(click the legend and press Delete) Add x-axis and y-axis titles Remove the gridlines

To add Axis Titles: Select Layout Tab Select Axis Titles First Select Horizontal Axis Title and then Click Title Below Axis – Replace with Week Go through same steps above and click Primary Vertical Axis Title and then click Rotated Title – Replace with Sales To Change Gridlines: Click Gridlines Point to Primary Horizontal Gridlines Click None Resize to fit in the range D1 through L11.

Repeat the process for Profit, changing titles as shown

Rebuild the line chart using both Sales and Profit, changing titles as shown and using Move Chart to move to another page.

To improve the scaling need a 2-axis chart Click the Profit line on the chart On the Format tab, select Format Selection Select Secondary Axis option button

Scatter Diagrams- Personal Computers
Issue: Analyze the relationship between PC sales price and the processing speed of the PC Objective: Use Excel 2007 to develop a scatter diagram for PC price and speed. Data File is Personal Computers.xls

Open the Excel file called Personal Computers.xls The file contains data for 14 PC’s

Select columns to be graphed (C and G) Select Insert Select Scatter Select Scatter with only Markers

Use Design tab to move to a new sheet Use Layout tab to add titles and remove grid lines

Guide to Using Excel 2007 For Basic Statistical Applications

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