Introduction to spss

An Introduction to SPSS www.profmanishparihar.blogspot.com Source: Johan Smits Saxion Market Research

What is SPSS? ,[object Object],[object Object],[object Object],[object Object],[object Object]

About SPSS Incorporated ,[object Object],[object Object]

[object Object],[object Object],[object Object]

Ownership history ,[object Object],[object Object]

We already know that a Research Process consists of: ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Translate the Questionnaire into codes and enter data in SPSS ,[object Object],SPSS comes into picture after data has been collected by lets say: questionnaires

Important factors to consider before data entry into SPSS ,[object Object],[object Object],[object Object]

Question-response formats can be of the following types: ,[object Object],[object Object],[object Object],[object Object]

Examples Response-format :: Closed-Ended ,[object Object],[object Object]

Coding the answers ,[object Object]

Response-format :: Closed-Ended ,[object Object],[object Object],[object Object]

Open-ended with numerical response ,[object Object],[object Object],Enter these types of data As it is….

Open-ended with text response ,[object Object],[object Object],[object Object],[object Object]

Scale characteristics are of three types in SPSS: ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Levels of Measurement

Coding data into the SPSS ,[object Object],[object Object],[object Object],[object Object],[object Object]

Some snapshots of the SPSS window:

The SPSS Data Editor ,[object Object]

The SPSS Data Editor ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SPSS Menu’s ,[object Object],[object Object],[object Object],[object Object]

SPSS Menu’s ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SPSS Output ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Part 1: Descriptive Statistics PASW Statistics 17 (SPSS 17) ITS Training Program www.youtube.com/mycsula

Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What is PASW? Predictive Analytics Software

What is Statistics? ,[object Object],[object Object],[object Object]

Research Stages ,[object Object],[object Object],[object Object],[object Object]

Format of Questions Easy to enter Easy to construct Difficult to construct Difficult to enter Invalid responses What is your gender? a. Female b. Male What is your gender? ( _____________ ) Fixed Response Open-Ended Response e.g. PROs CONs

Running Descriptive Statistics ,[object Object],[object Object],[object Object]

Frequency Analysis ,[object Object],[object Object]

Research Question #1 ,[object Object]

Crosstabs ,[object Object],[object Object]

Improving Your Survey ,[object Object],[object Object]

Selecting Cases Filter out and specify which variable to use for analysis with the select cases function.

Splitting the File The split file function is used to compare the responses or performance differences by groups within one variable.

Research Question #3 ,[object Object],[object Object]

Part 2: Test of Significance PASW Statistics 17 (SPSS 17) ITS Training Program www.youtube.com/mycsula

Purpose of This Workshop ,[object Object],SAMPLE POPULATION Is it statistically significant?

Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],Null Hypothesis

Null Hypothesis ,[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],Hypothesis Testing Take note that the result is always stated in relation to the null hypothesis , not the alternate.

Correlations No Relationship A correlation is a statistical device that measures the nature and strength of a supposed linear association between two variables. Y X Negative Relationship Y X Y X Positive Relationship

Correlation Coefficient ,[object Object],Direction Magnitude The strength of the linear relationship is determined by the distance of the correlation coefficient (r) from zero.

Research Question #1 Is there a relationship between academic performance and Internet access? H 0 = Internet access made no difference H 1 = Internet access made a different

Research Question #1 Is there a relationship between academic performance and Internet access?

T test ,[object Object],[object Object],[object Object]

Research Question #2 ,[object Object],[object Object],[object Object]

Independent-Samples T Test The first set of hypotheses is testing the variance, while the proceeding set is testing for the mean. The variances have to be equal before we can determine if the means are equal. H 0 : (µ (light) ≠ µ (dark) H 1 : (µ (light) ≠ µ (dark) ,[object Object],[object Object]

Research Question #3 ,[object Object],[object Object],[object Object]

Running Multiple Response Sets ,[object Object],[object Object],[object Object]

Merging Data Files ,[object Object],[object Object],[object Object],[object Object]

Part 3: Regression Analysis PASW Statistics 17 (SPSS 17) ITS Training Program www.youtube.com/mycsula

Purpose of This Workshop ,[object Object],[object Object]

Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What Is Linear Regression? ,[object Object],[object Object],[object Object],[object Object],[object Object]

What Is Polynomial Regression? ,[object Object],[object Object]

Dependent and Independent Variables ,[object Object],[object Object],[object Object],[object Object]

Scatter Plot ,[object Object],[object Object],[object Object]

Scatter Plot Create a scatter plot to determine if a linear relationship exists between variables.

Using Simple Regression ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Using Multiple Regression ,[object Object],[object Object]

Using Multiple Regression ,[object Object],[object Object],[object Object],[object Object],[object Object]

Computing ,[object Object],[object Object]

Using Polynomial Regression Variable Meaning a Constant b j The coefficient for the independent variable to the j’th power e i Random error term

Editing Charts Adding a Best Fit Line at Total

Editing Charts – Manipulating Scales

Editing Charts – Title and Gridlines

Editing Charts – Adding Colors

Part 4: Chi-Square and ANOVA PASW Statistics 17 (SPSS 17) ITS Training Program www.youtube.com/mycsula

Purpose of This Workshop ,[object Object],[object Object],[object Object],[object Object]

Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],Using Chi-Square Test with Fixed Expected Values

Using Chi-Square Test with a Contiguous Subset

Using One-Way ANOVA ,[object Object],[object Object],[object Object],[object Object]

Using Post Hoc Tests ,[object Object],[object Object]

Using Post Hoc Tests LSD stands for List Squared Difference.

Using Two-Way ANOVA ,[object Object],[object Object],[object Object],[object Object],[object Object]

Importing/Exporting Data ,[object Object],[object Object]

Using Scripting in PASW Statistics ,[object Object],[object Object],[object Object]

Introduction to spss

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