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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 By Groebner, Shannon, Fry, & Smith Prentice-Hall Publishing Company Copyright, 2011

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

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

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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

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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

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Frequency Distributions-Athletic Shoe Survey Select Stat then select Tables then Tally Individual Variables

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Frequency Distributions-Athletic Shoe Survey Select Number of Nike variable – Display Counts – OK

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Frequency Distributions-Athletic Shoe Survey Resulting Frequency Counts

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Histograms Capital Credit Union 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

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Histograms-Capital Credit Union Open the Minitab file called Capital.MTW File contains 300 observations - Column C2 contains the balances

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Select Graph and Histogram Histograms-Capital Credit Union

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Click Simple - OK Histograms-Capital Credit Union

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Select variable to be graphed - OK Histograms-Capital Credit Union

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Completed Histogram Histograms-Capital Credit Union

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Joint Frequency Distributions Capital Credit Union 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

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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

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First, organize the Credit balances into groups (see Example 2-5) Select Data – Code – Numeric to Text Joint Frequency Distributions-Capital Credit Union

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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

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To create the joint frequency table, use Stat – Tables – Cross Tabulation and Chi- square Joint Frequency Distributions-Capital Credit Union

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Click Column Percents - OK Joint Frequency Distributions-Capital Credit Union Define variables to be uses (Classes and Gender)

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Joint Frequency Distributions-Capital Credit Union Completed Joint Frequency Distribution

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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

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Bar Charts-Bach, Lombard & Wilson Open the Minitab file called Bach.MTW

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Bar Charts-Bach, Lombard & Wilson Must Rearrange the data. Select Data - Stack - Columns

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Bar Charts-Bach, Lombard & Wilson Select Variables – Identify New Column Name – and Column for category labels - OK

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Bar Charts-Bach, Lombard & Wilson Stack the Year variable - OK

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Select Graph – Bar Chart Bar Charts - Bach, Lombard & Wilson

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Under Bars represent – Select Values from a table - OK Bar Charts-Bach, Lombard & Wilson

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Select Cluster – Click OK Bar Charts-Bach, Lombard & Wilson

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Define Variable to Graph and Categories - OK Bar Charts-Bach, Lombard & Wilson

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Finished Bar Chart 1= Males, 2 = Females Bar Charts-Bach, Lombard & Wilson

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

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Line Charts-McGregor Vineyards Open the Minitab file called McGregor.MTW File contains 20 weeks of historic data

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Select Time Series Plot. Click on Graph Line Charts-McGregor Vineyards

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Select Simple - OK Line Charts-McGregor Vineyards

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Define Variables to be Graphed – Select Multiple Graphs Line Charts-McGregor Vineyards

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Define Output Option – Click OK - OK Line Charts-McGregor Vineyards

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Finished Line Chart for the Sales and the Profit Variables. Line Charts-McGregor Vineyards

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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

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Scatter Diagrams- Personal Computers Open the Minitab file called Computers.MTW File contains data for 36 PCs

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Click on the Graph, select Scatter plot Scatter Diagrams- Personal Computers

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Select Simple – Click OK Scatter Diagrams- Personal Computers

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Define the Y and X variables Click OK Scatter Diagrams- Personal Computers

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Completed Scatter Diagram Scatter Diagrams- Personal Computers

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