Tag: inferential statistics

SPSS – Quick Overview Statistical Functions

This tutorial walks you through SPSS’ main statistical functions. They are mainly used with COMPUTE and IF. Note that these are all within-subjects (or “horizontal”) functions. For between-subjects (or “vertical”) functions, see AGGREGATE. All examples in this tutorial use hospital.sav, which is freely downloadable. Within-subjects versus between-subjects functions. SPSS Statistical Functions – Missing Values SPSS statistical functions only return system missing values if all their input values […]

Inferential Statistics – Quick Introduction

“Inferential statistics” is the branch of statistics that deals with generalizing outcomes from (small) samples to (much larger) populations. Also, “inferential statistics” is the plural for “inferential statistic”Some key concepts are statistical significance testing; confidence intervals; statistical power; null hypotheses; standard errors. All of these basically aim at drawing conclusions (or “inferences”) on populations based on […]

Simple Overview Statistical Comparison Tests

The vast majority of statistical tests really just compare several populations on one variable or compare several variables in one population. Now, if we add to this comparison the number of variables or populations and the measurement levels of our variables then choosing the appropriate statistical test suddenly becomes remarkably easy.* The overviews below also nicely visualize how basic tests relate […]