Obtaining descriptive statistics (Open University)
This free tutorial from the Open University shows how to produce descriptive statistics for continuous variables. You will need to register to access the content.

SPSS tutorials: descriptive statistics for continuous variables (Kent State University)
This tutorial from Kent State University shows how to produce and interpret measures of central tendency and dispersion.

Summarizing quantitative data (Khan Academy)
This unit from the Khan Academy covers measures of central tendency and dispersion as well as boxplots.

Correlation (Open University)
This free tutorial from the Open University shows how to produce a bivariate correlation. You will need to register to access the content.

SPSS tutorials: Pearson correlation (Kent State University)
This tutorial from Kent State University shows how to produce and interpret a Pearson correlation.

Select cases (Barnard College)
This tutorial from Barnard College demonstrates how to use the Select Cases command to filter cases, including applying multiple filters.