Groebner Business Statistic 8ed Ch02 Minitab Tutorial

transcript

Guide to Using Minitab 14 For Basic

Statistical Applications

To Accompany

Business Statistics: A Decision Making

Approach, 8th Ed.

Chapter 2:

Graphs, Charts and Tables - Describing

Your Data

Groebner, Shannon, Fry, & SmithPrentice-Hall Publishing Company

Copyright, 2011

Chapter 2 Minitab Examples

Frequency Distributions -

Athletic Shoe Survey

Histograms-

Capital Credit Union

Joint Frequency Distributions-

Joint Relative Frequencies-

More Examples

Chapter 2 Minitab 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 Minitab to develop a frequency

distribution for the number of Nike shoes owned

by college students.

Data File is SportShoes.MTW

Frequency Distributions-Athletic Shoe Survey

Open the Minitab file called Sportshoes.MTW

The file contains 100 observations. Column C5 contains the Number of Nike Shoes owned

Select Stat then select Tables then Tally Individual Variables

Select “Number of Nike” variable –Display Counts – OK

Resulting Frequency Counts

Histograms

Issue: Analyze credit card balances for Capital Credit Union customers using a frequency distribution and histogram.

Objective: Use Minitab to develop a frequency distribution and histogram for credit card balances. Use ten class intervals.

Data file is Capital.MTW

Histograms-Capital Credit Union

Open the Minitab file called Capital.MTW

File contains 300 observations - Column C2 contains the balances

Select Graph and Histogram

Click Simple - OK

Select variable to be graphed - OK

Completed Histogram

Joint Frequency Distributions

Issue: Analyze the credit card balances by gender of the card holder.

Objective: Use Minitab to develop a joint frequency distribution for the credit card balances by gender.

Data File is Capital.MTW

Joint Frequency Distributions-Capital Credit Union

Open the Minitab file called Capital.MTW

File contains 300 observations - Column C2 contains the balances, Column C3 contains the gender code

First, organize the Credit balances into groups (see Example 2-5)

Select Data – Code –Numeric to Text

Identify variable to be Recoded – indicate where to store new variable

Click OK

Minitab only codes 8 classes at a time. Code the first 8 classes; then code the remaining classes

To create the joint frequency table, use Stat– Tables – Cross Tabulation and Chi-square

Click Column Percents - OK

Define variables to be uses (Classes and Gender)

Completed Joint Frequency Distribution

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 Minitab to develop bar charts for

the starting salary data for males and females.

Data File is Bach.MTW

Bar Charts-Bach, Lombard & Wilson

Open the Minitab file

called Bach.MTW

Must Rearrange

the data. SelectData - Stack -

Columns

Select Variables – Identify

New Column Name – and

Column for category labels -

Stack the Year variable - OK

Select Graph – Bar Chart

Bar Charts - Bach, Lombard & Wilson

Under Bars represent –Select Values from a table -OK

Select Cluster –

Click OK

Define Variable to Graph and Categories - OK

Finished Bar Chart 1= Males, 2 = Females

Line Charts-

McGregor Vineyards

Issue: Analyze the sales and profits data over

Objective: Use Minitab to develop line charts for

weekly sales and profits.

Data File is McGregor.MTW

Line Charts-McGregor Vineyards

Open the Minitab file called McGregor.MTW

File contains 20 weeks of historic data

Select Time Series Plot.

Click on Graph

Select Simple -OK

Define Variables to be Graphed – Select Multiple Graphs

Define Output Option –Click OK - OK

Finished Line Chart for the Sales and the Profit Variables.

Scatter Diagrams-

Personal Computers

Issue: Analyze the relationship between PC

sales price and the processing speed of the PC

Objective: Use Minitab to develop a scatter

diagram for PC price and speed.

Data File is Computers.MTW

Scatter Diagrams- Personal Computers

Open the Minitab file called Computers.MTW

File contains data for 36 PC’s

Click on the Graph,select Scatter plot

Select Simple –Click OK

Define the Y and X

variables Click

Completed Scatter Diagram

Groebner Business Statistic 8ed Ch02 Minitab Tutorial

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