An Interactive Tutorial for SPSS 10.0 for Windows© Creating Scatterplots by Julia Hartman Next © Copyright 2000, Julia Hartman 1 Scatterplots: Introduction A scatterplot may help you to understand how well linear regression fits your data. You may find that a quadratic equation would be more appropriate than a linear one. Next © Copyright 2000, Julia Hartman 2 Scatterplots : Introduction Variables totcum: Undergraduate GPA (Total Cumulative) nmtot1: MCAT Total 1992-present, most recent usmle2: USMLE Step 2 Next © Copyright 2000, Julia Hartman 3 Scatterplots : Starting the Procedure • In the menu, click Graphs © Copyright 2000, Julia Hartman 4 Scatterplots: Starting the Procedure • In the menu, click Graphs • Point to Scatter… © Copyright 2000, Julia Hartman 5 Scatterplots: Starting the Procedure • In the menu, click Graphs • Point to Scatter… …and click. © Copyright 2000, Julia Hartman 6 Scatterplots: Selecting the Type of Scatterplot This tutorial demonstrates a plot of 3 continuous variables, so first click the button for 3-D. © Copyright 2000, Julia Hartman 7 Scatterplots: Selecting the Type of Scatterplot This tutorial demonstrates a plot of 3 continuous variables, so first click the button for 3-D. Then click the Define button. © Copyright 2000, Julia Hartman 8 Scatterplots: Selecting Variables Scroll down the variable list, © Copyright 2000, Julia Hartman 9 Scatterplots: Selecting Variables Scroll down the variable list, point to the variable labeled UNDERGRAD GPA TOTAL - CUMULATIVE © Copyright 2000, Julia Hartman 10 Scatterplots: Selecting Variables Scroll down the variable list, point to the variable labeled UNDERGRAD GPA TOTAL - CUMULATIVE …and click. © Copyright 2000, Julia Hartman 11 Scatterplots: Selecting Variables Move totcum to the box labeled X Axis: by clicking the arrow. © Copyright 2000, Julia Hartman 12 Scatterplots: Selecting Variables A few variables down the list, point to nmtot1, which is labeled MCAT TOTAL 1992PRESENT, MOST RECENT © Copyright 2000, Julia Hartman 13 Scatterplots: Selecting Variables A few variables down the list, point to nmtot1, which is labeled MCAT TOTAL 1992PRESENT, MOST RECENT …and click. © Copyright 2000, Julia Hartman 14 Scatterplots: Selecting Variables Move nmtot1 to the box labeled Z Axis: by clicking the arrow. © Copyright 2000, Julia Hartman 15 Scatterplots: Selecting Variables Scroll further down the list and point to the variable usmle2, which is labeled USMLE STEP 2, © Copyright 2000, Julia Hartman 16 Scatterplots: Selecting Variables Scroll further down the list and point to the variable usmle2, which is labeled USMLE STEP 2 TOTAL, © Copyright 2000, Julia Hartman 17 Scatterplots: Selecting Variables Scroll further down the list and point to the variable usmle2, which is labeled USMLE STEP 2 TOTAL, …and click. © Copyright 2000, Julia Hartman 18 Scatterplots: Selecting Variables Move usmle2 to the box labeled Y Axis: by clicking the arrow. © Copyright 2000, Julia Hartman 19 Scatterplots: Selecting Variables Click the OK button to produce the scatterplot. © Copyright 2000, Julia Hartman 20