## 24 Jul Chapter 3 – Variable independence test in SPSS

Chi Square test can be used to determine if two variables are dependent or independent to each other....

Chi Square test can be used to determine if two variables are dependent or independent to each other....

If dummy variable has k categories then when to use K binomial dummies and when to use K-1 dummies to avoid dummy variable trap....

Mann Whitney U test is used to compare the mean of a single variable which has two categories....

Wilcoxon test for mean equality is used to compare the means to two variables with equal observations and is normally distributed....

SPSS Modeler software can be used to create decision trees using diagrams and data. Following video provides illustration....

ROC graph plots the true positives and false positives. It shows the sensitivity and specificity of the data, we locate the point on the line which is nearest to the top left corner of the graph which has highest specificity and sensitivity....

Kolmogorov - Smirnov Test can be used to confirm if the data is normally distributed or not. This test also identifies the presence of outliers. This test also shows the Q - Q plot and Shapiro - Wilk test for normality...

SPSS can be used to calculate the z values / normalized form of the variables. This standardization can be used to fulfill several purposes like comparing different variables with different units with each other. ...

SPSS can handle basic time series data, and the common transformation like lag, first difference can be taken on the data in this software ...

SPSS has a time series modular which can be used to do forecasting from this software. Following tutorial briefly introduces this aspect of SPSS ...