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By Dr. Madhukar H. Dalvi Nagindas Khandwala college
Introduction to SPSS By Dr. Madhukar H. Dalvi Nagindas Khandwala college
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Objective of the Presentation
About the four-windows in SPSS The basics of managing data files The basic analysis in SPSS 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Introduction: What is SPSS?
Originally it is an acronym of Statistical Package for the Social Science but now it stands for Statistical Product and Service Solutions One of the most popular statistical packages which can perform highly complex data manipulation and analysis with simple instructions 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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VERSIONS OF SPSS SPSS Ver-1 to Ver-5 : DOS VERSIONS
SPSS Ver-6 to Ver-20 : WINDOWS VERSIONS SPSS-X : For MAIN FRAMES (on various operating system platforms) SPSS-LAN: For LAN Web site: 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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BASIC APPLICATIONS Creating data as Spread-sheet
Generating Reports as Tables Statistical Analysis of Data Graphic Presentations Define 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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MAIN STEPS IN USING SPSS
Creating data or Getting data Defining data Modifying data Processing data generating tables statistical analysis generating graphs 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Data editor Output viewer Syntax editor Script window
The Four Windows: Data editor Output viewer Syntax editor Script window
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The Four Windows: Data Editor
Data Editor NATIONAL INSURANCE\NATIONAL INSURANCE.sav Spreadsheet-like system for defining, entering, editing, and displaying data. Extension of the saved file will be “sav.” 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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The Four Windows: Output Viewer
Output Viewer NATIONAL INSURANCE\NATIONAL INSURANCE OUTPUT.sav.spv Displays output and errors. Extension of the saved file will be “spv.” 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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The Four Windows: Syntax editor
Text editor for syntax composition. Extension of the saved file will be “sps.” 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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The Four Windows: Syntax editor
Script Window Provides the opportunity to write full-blown programs, in a BASIC-like language. Text editor for syntax composition. Extension of the saved file will be “sbs.” 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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The basics of managing data files
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Opening SPSS Start → All Programs → SPSS Inc→ SPSS 16.0
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Opening SPSS The default window will have the data editor
There are two sheets in the window: 1. Data view Variable view 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Data Definition Variables Name Variable Type Field Width
Decimal Positions Variable Label Value Labels Missing Values Column Width Alignment Scale 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Data View window The Data View window
This sheet is visible when you first open the Data Editor and this sheet contains the data Click on the tab labeled Variable View This window shows the actual data values and the name of the variables. Click 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Variable View window This sheet contains information about the data set that is stored with the dataset Name The first character of the variable name must be alphabetic Variable names must be unique, and have to be less than 64 characters. Spaces are NOT allowed. 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Variable View window: Type
Click on the ‘type’ box. The two basic types of variables that you will use are numeric and string. This column enables you to specify the type of variable. 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Variable View window: Width
Width allows you to determine the number of characters SPSS will allow to be entered for the variable 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Variable View window: Decimals
Number of decimals It has to be less than or equal to 16 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Variable View window: Label
You can specify the details of the variable You can write characters with spaces up to 256 characters 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Variable View window: Values
This is used and to suggest which numbers represent which categories when the variable represents a category 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Defining the value labels
Click the cell in the values column as shown below For the value, and the label, you can put up to 60 characters. After defining the values click add and then click OK. Click 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Practice 1 How would you put the following information into SPSS?
Value = 1 represents Male and Value = 2 represents Female 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Practice 1 (Solution Sample)
Click 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Click 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Saving the data To save the data file you created simply click ‘file’ and click ‘save as.’ You can save the file in different forms by clicking “Save as type.” Click 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Sorting the data Click ‘Data’ and then click Sort Cases
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Sorting the data (cont’d)
Double Click ‘Name of the students.’ Then click ok. Click Click 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Practice 2 How would you sort the data by the ‘Height’ of students in descending order? Answer Click data, sort cases, double click ‘height of students,’ click ‘descending,’ and finally click ok. 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Transforming data Click ‘Transform’ and then click ‘Compute Variable…’
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Transforming data (cont’d)
Example: Adding a new variable named ‘lnheight’ which is the natural log of height Type in lnheight in the ‘Target Variable’ box. Then type in ‘ln(height)’ in the ‘Numeric Expression’ box. Click OK Click 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Transforming data (cont’d)
A new variable ‘lnheight’ is added to the table 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Practice 3 Create a new variable named “sqrtheight” which is the square root of height. Answer 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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The basic analysis
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The basic analysis of SPSS that will be introduced in this class
Frequencies This analysis produces frequency tables showing frequency counts and percentages of the values of individual variables. Descriptives This analysis shows the maximum, minimum, mean, and standard deviation of the variables Linear regression analysis Linear Regression estimates the coefficients of the linear equation 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Opening the sample data
Open ‘Employee data.sav’ from the SPSS Go to “File,” “Open,” and Click Data 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Opening the sample data
Go to Program Files,” “SPSSInc,” “SPSS17,” and “Samples” folder. Open “Employee Data.sav” file 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Frequencies Click ‘Analyze,’ ‘Descriptive statistics,’ then click ‘Frequencies’ 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Frequencies Click gender and put it into the variable box.
Click ‘Charts.’ Then click ‘Bar charts’ and click ‘Continue.’ Click Click 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Frequencies Finally Click OK in the Frequencies box. Click
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Practice 4 Do a frequency analysis on the variable “minority”
Create pie charts for it 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Answer 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Descriptives Click ‘Analyze,’ ‘Descriptive statistics,’ then click ‘Descriptives…’ Click ‘Educational level’ and ‘Beginning Salary,’ and put it into the variable box. Click Options Click 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Descriptives The options allows you to analyze other descriptive statistics besides the mean and S.d. Click ‘variance’ and ‘kurtosis’ Finally click ‘Continue’ Click Click 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Descriptives Finally Click OK in the Descriptives box. You will be able to see the result of the analysis. 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Regression Analysis Click ‘Analyze,’ ‘Regression,’ then click ‘Linear’ from the main menu. 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Regression Analysis For example let’s analyze the model
Put ‘Beginning Salary’ as Dependent and ‘Educational Level’ as Independent. Click Click 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Regression Analysis Clicking OK gives the result 6/17/2018 9:18 PM
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Plotting the regression line
Click ‘Graphs,’ ‘Legacy Dialogs,’ ‘Interactive,’ and ‘Scatterplot’ from the main menu. 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Plotting the regression line
Drag ‘Current Salary’ into the vertical axis box and ‘Beginning Salary’ in the horizontal axis box. Click ‘Fit’ bar. Make sure the Method is regression in the Fit box. Then click ‘OK’. Click Set this to Regression! 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Practice 5 Find out whether or not the previous experience of workers has any affect on their beginning salary? Take the variable “salbegin,” and “prevexp” as dependent and independent variables respectively. Plot the regression line for the above analysis using the “scatter plot” menu. 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Answer Click 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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Click on the “fit” tab to make sure the method is regression
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Getting data from Excel file NATIONAL INSURANCE\NATIONAL INSURANCE.sav
The first row in Excel sheet must contain names of the variables. The data must begin from the second row. After transferring data from Excel sheet to SPSS, the definitions must be written by going to variable view. 6/17/2018 9:18 PM BY DR. MADHUKAR H.DALVI
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THANK YOU ALL. mhdalvi@yahoo.com m :9969946117 6/17/2018 9:18 PM
BY DR. MADHUKAR H.DALVI
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