displaying data frequency distributionsfrequency distributions ◦athletic shoe survey histograms...

Displaying Data Frequency Distributions

◦ Athletic Shoe Survey

Histograms◦ Capital Credit Union

Joint Frequency Distributions◦ Capital Credit Union

Joint Relative Frequencies◦ Capital Credit Union

More Examples

Displaying Data Bar Charts

◦ Bach, Lombard & Wilson

Line Charts◦ McGregor Vineyards

Scatter Diagrams◦ Personal Computers

Frequency Distribution –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 2010 to develop a frequency distribution for the number of Nike shoes owned by college students. Data File is SportShoes.xlsx


File contains 100 observations.Last row is 102.Column E contains the Numberof Nike Shoes Owned.

Open File: SportShoes.xlsx


Enter the Possible Values for the Variable:

Number of Nikes Owned

Select the cells tocontain the Frequency

values


Select theFormulas tab

Click on button

SelectStatistical

SelectFREQUENCY

function


Enter the rangeof data

Enter the binrange (the cellscontaining the

possible numberof shoes) Results are

shown here

PressCtrl-Shift-Enter

Do not press OK!


Frequencies are shown here.

Histograms –Capital Credit Union

Issue: Consider Capital Credit Union (CCU) in Mobile, Alabama, which recently began issuing a new credit card. Managers at CCU have been wondering how customers use this card, so a sample of 300 customers was selected.

Objective: Use Excel 2010 to develop a histogram for the credit card balances. Use 10 class intervals.Data File is Capital.xlsx


File contains 300 observations.Last row is 301.Column B contains balances.

Open File: Capital.xlsx


Use Excel’s MAXfunction to determine

the largest value.


Use Excel’s MINfunction to determine

the largest value.


Compute rangeas Maximum - Minimum

Compute class width

• Divide Range by 10to construct 10 classes:1394 / 10 = 139.4

• Round up to 150.0


Set up an area on the worksheet for the binsand be sure to includea label such as “Bins”


Select theData tab

Click onData Analysis

Select Histogram


Input Range specifies the actual data values:

Column B

Bin Range:Column F

Put on a New Worksheet Ply

and includeChart Output


“Bins” title was replacedby “Balances”, and“Frequency” legend

was removed..

Excel’s default on a histogram is to include a More category. Remove the More category from the chart. Select the chart, right-click, Select Data, Edit Frequency. In the Edit Series

dialog box, change Series Values to $B$11 rather than $B$12.


• Right-click on any ofthe bars in the Histogram

• Select Format DataSeries


Set Series Overlap and Gap Width to 0%

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 0-239.99,240-389.99, etc. and delete the More

bins and frequency.

Change the Histogram title to Credit Card Balances.

See next slide for final result.

Joint Frequency Distributions –Capital Credit Union

Issue: Consider Capital Credit Union (CCU) in Mobile, Alabama, which recently began issuing a new credit card. Managers at CCU have been wondering how customers use this card, so a sample of 300 customers was selected. Analyze the credit card balances by gender of the card holder.

Objective: Use Excel 2010 to develop a joint frequency distribution for the credit card balances by gender. Data File is Capital.xlsx


File contains 300 observations.Last row is 301.Column B contains balances.Column C contains gender.

Open File: Capital.xlsx


Select theInsert tab

SelectPivot Table

Table/Rangeselected

automatically.

SelectNew Worksheet

Place cursoranywhere in

the data


On the Options tabselect Options in

the Pivot Table group.


Select the Display taband check the

Classic Pivot Table layout.


Drag Credit Card Account Balanceto “Drop Row Fields Here” area.


Right-click in Credit Card Account Balance numbers and click Group.


Change:Starting at to 90

Ending at to 1589By to 150

Drag Genderto “Drop Column Fields Here” area.

Drag Credit Card Account Balanceto “Drop Value Fields Here” area.


Place cursor inthe Data Item area.

Right-click.

Select SummarizeValues By

Select Count


Completed!

Joint Relative Frequencies –Capital Credit Union

Issue: Consider Capital Credit Union (CCU) in Mobile, Alabama, which recently began issuing a new credit card. Managers at CCU have been wondering how customers use this card, so a sample of 300 customers was selected.

Objective: Use Excel 2010 to develop a joint relative frequency distribution for the credit card balances by gender. Data File is Capital.xlsx

Note: See previous example for Pivot Table Instructions.


Right-click anywhere in the

values of thepivot table.

Select Value Field

Settings


Click on the down arrowand select % of Grand Total.

Select Show values as


Data in the pivot tableare representedin percentages

Bar Charts –Bach, Lombard & Wilson

Issue: Consider Bach, Lombard & Wilson, a New England law firm. Recently, a firm handled a case in which a woman was suing her employer, a major elecronics firm, claiming the company gave a higher starting salaries to men than to women.

Objective: Use Excel 2010 to develop bar chart for the starting salary data for males and females. Data File is Bach.xlsx


Open File: Bach.xlsx


Select the datain columns B and C

Select theInsert tab Select

Column

Select 2-D Paired

Column


Click onSelect Data


To change thehorizontal axislabels to Years

select Edit


Select cells A2through A8 to

display years asthe labels

Line Charts –McGregor Vineyards

Issue: McGregor Vineyards owns and operates a winery in the Sonoma Valley in Northern CaliforniaAt a recent company meeting, the financial manager presented weekly profit and sales data.

Objective: Use Excel 2010 to develop line charts to analyze weekly sales and profits. Data File is McGregor.xlsx


File contains 20 weeks ofhistoric data. The last row is 21.

Open File: McGregor.xlsx


Select the datain column B


Select Line

Select 2-D Line

with Markerssample

line chart


• Change the title (clickthe title and replace itwith Sales Trend)

• Delete the legend Sales (dollars) (clickthe legend and pressDelete)

• Add x-axis andy-axis titles

• Remove the gridlines


Repeat theprocess for

Profit


Rebuild the linechart using bothSales and Profit

Use Move Chartto move chart tothe New sheet


Improve the scaling.Select Profit Line

on graph andright-click.

Select FormatData Series.


SelectSecondary Axis.Click on Layout

and add titlesas desired.

Scatter Diagrams –Personal Computers

Issue: A few years ago, we examined various Web sites looking for the best prices on personal computers. We collected data about 13 personal computers prices, processor speed and other characteristics.

Objective: Use Excel 2010 to develop a scatter diagram for PC price and processor speed. Data File is Personal Computers.xlsx


File contains data about 13 PCs.Processor speed is located in Column C, price – in Column G

Open File: Personal Computers.xlsx


Select columns to beused for scatter diagram


ClickScatter

ClickScatter

with onlyMarkers


• Use the Design tab to putdiagram to a new sheet.

• Use the Layout tab to add titles and remove grid lines.

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