ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

How to Complete a Regression Analysis in Minitab 18

Updated on August 1, 2018
Joshua Crowder profile image

Joshua has work experience in aerospace/aluminum manufacturing & distribution. He received his BBA in accounting from Kent State University.

“In God we trust. All others must bring data.” ~W. Edward Deming
“In God we trust. All others must bring data.” ~W. Edward Deming

Why We Use Regression Analysis

When you look at a scatter plot graph created from the plotting of dots from two different axes, you will find that the variables are inversely related, directly related, or show no relation at all. If the line you draw to estimate regression seems to be moving from left to the upper right corner of the scatter plot the data is said to be directly related and inversely related if moving from left to the lower right corner. When the data plots Are spread out evenly with no apparent direction there is no relationship. It‘s nice to have a quick view of the scatter plot, but a relationship between variables can be more accurately determined through regression analysis. In this tutorial a scattered plot with a regression line will be created. To follow along with this lesson download this Minitab file. Also, if you don't have the latest version of Minitab you can download a free trial for the new version here.

Add Data to Minitab

To add data to Minitab the data must be entered or pasted into the program from a spreadsheet. The data should come in the form of X,Y separately to be able to complete an analysis.

The only variable data used for the scattered plot graph or regression analysis are the dependent and independent variables X and Y.
The only variable data used for the scattered plot graph or regression analysis are the dependent and independent variables X and Y.

Set-up Scatter Plot With a Regression

The first graph that we need to bring up for a regression analysis is a scattered plot graph. To set-up this graph click Graph→Scatterplot. When the scatterplot window appears select the box labeled "With Regression" and click OK. When the scattered plot with regression window appears put the cursor in the first row of the Y-axis box, then double click on the Y variable to the left. Next, double click on the X variable and it will populate the X section. A default name will appear if you do not create a title so I'm going to create my own title by clicking on "Labels." Then click in the title text box and type "Scatter Plot Graph of Cars Sold VS. TV Ads" and click OK. Click the OK button again and the scatter plot diagram with regression will appear.

Click the Tab Graph and Select Scattered Plot

Select With Regression

Add Variables

Set-up Fit Regression Model

To set-up additional regression graphs click Data→Regression→Regression→Fit Regression Model. Now you must place your cursor in the "Responses" section and click on the cars sold header (Y variable) to the left. Click in the "Continuous predictors" section and then click on TV Ads header (X variable). Find the storage button and click on it. From the check boxes select Fits, Standardized residuals, and Coefficients. Click Okay. There one more task that will allow us to show multiple residual graphs. Click on Regression Graphs and choose the option "Four in one." Now click Okay. Then click OK again.

Click Data, Regression, Regression, Fit Regression Model

Add Variables

Scattered Plot, Residual Plots, and Regression Output Data

The scatter plot shows us that the number of cars sold is directly related to the amount of TV adverting. This can be visibly seen without having the regression display in the graph. The residual plots graphically display difference between the observed value of the dependent variable (y) and the predicted value (x). And finally, the output data shows a numerical analysis of the variance.

Scattered Plot

Residual Plots

Regression Output

References

Boyer, K. & Verma, R. (2010). Operations & supply chain management for the 21st century. Mason, OH: South-Western.

© 2018 Joshua Crowder

Comments

    0 of 8192 characters used
    Post Comment

    No comments yet.

    working

    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, hubpages.com uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at: https://hubpages.com/privacy-policy#gdpr

    Show Details
    Necessary
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the googleapis.com or gstatic.com domains, for performance and efficiency reasons. (Privacy Policy)
    Features
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Marketing
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Statistics
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)