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SPSS (Statistical Package for Social Science)
Dr.LILLY GEORGE Head of the Department, Department of Statistics, St. Joseph’s College, Trichy.
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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
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Opening SPSS The default window will have the data editor
There are two sheets in the window: 1. Data view 2. Variable view
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Scales of Measurement Nominal Scale - groups or classes Gender
Ordinal Scale - order matters Ranks (top ten videos) Interval Scale - difference or distance matters – has arbitrary zero value. Temperatures (0F, 0C), Likert Scale Ratio Scale - Ratio matters – has a natural zero value. Salaries
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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
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Frequencies Click ‘Analyze,’ ‘Descriptive statistics,’ then click ‘Frequencies’
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Descriptives The options allows you to analyze other descriptive statistics besides the mean and Std. Click ‘variance’ and ‘kurtosis’ Finally click ‘Continue’ Click Click
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Descriptives Finally Click OK in the Descriptives box. You will be able to see the result of the analysis.
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Graphs Click ‘Graphs,’ ‘Legacy Dialogs,’ ‘Interactive,’ and ‘Scatter plot’ from the main menu.
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Bar Chart
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Pie Chart
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Line Chart
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Histogram Really just a bar chart that displays “Num of Cases” only
Click “Display Normal Curve” to inspect if your distribution deviates from normal
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Regression Analysis Click ‘Analyze,’ ‘Regression,’ then click ‘Linear’ from the main menu.
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Regression Analysis
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One-Sample t Test Tests for difference between sample mean and pre-determined population mean Click “Analyze” “Compare Means” “One- Sample T Test…” “Test Value” = Predetermined population mean Options: Exclude Cases Listwise = If multiple variables used, only use cases that have values on ALL variables Exclude Cases Analysis by Analysis
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One-Sample T Test
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Independent-Samples t Test
Tests if two unrelated samples differ significantly from one another Click “Analyze” “Compare Means” “Independent-Samples T Test…” “Test Variable(s)” = DV “Grouping Variable” = IV Click “Define Groups…” MergeFile1.sav – Male = 1; Female = 0 If IV dimensional, can use cut point to create groups – i.e. x > 7 = Grp 1, x ≤ 7 = Grp 2 Levene’s Test for Equality of Variances If significant, equal variances cannot be assumed
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Independent-Samples t Test
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Paired-Samples t Test Tests if two related samples differ significantly from one another Click “Analyze” “Compare Means” “Paired-Samples T Test…”
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THANK YOU
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