This tutorial quickly walks you through the correct steps for running an independent samples t-test in SPSS.

Run the analysis yourself on our downloadable practice data file or look up some basics such as the assumptions or effect size.

Read more...

An independent samples t-test examines if 2 populations have equal means on some variable.

Example: do Dutch women have the same mean salary as Dutch men?

This tutorial quickly walks you through the basics such as the assumptions, null hypothesis and effect size for this test.

Read more...

A paired samples t-test examines if 2 variables have equal means in some population.

Example: were the mean salaries over 2018 and 2019 equal for all Dutch citizens?

This tutorial quickly walks you through the correct steps for running this test in SPSS.

Read more...

A one-sample t-test examines if a population mean is likely to be *x*: some hypothesized value.

Example: do the pupils from my school have a mean IQ score of 100?

This tutorial quickly walks you through the basics for this test, including assumptions, formulas and effect size.

Read more...

How to run a one sample t-test correctly in SPSS?

This simple tutorial with downloadable practice data quickly walks you through the right steps!

Read more...

Z-scores are scores that have mean = 0 and standard deviation = 1.

All scores can be **standardized** into z-scores by subtracting the mean from each score and then dividing it by the standard deviation.

Such standardized scores may be easier to interpret than the original scores. Z-scores may or may not be normally distributed.

Read more...

Cohen’s D is the effect size measure of choice for t-tests.

This simple tutorial quickly walks you through

- rules of thumb for small, medium and large effects;
- formulas for computing Cohen’s D and;
- software options for obtaining it.

Read more...

Dichotomous variables are variables that hold precisely two distinct values.

Example: sex can only be male or female.

Some analyses that are only suitable for dichotomous variables are

Read more...

## THIS TUTORIAL HAS 11 COMMENTS:

## By Saida Turaeva on January 23rd, 2019

I'll be so much glad if I can learn SPSS in a very short period of time.

I'm so much in need it!

## By rodz on February 13th, 2020

i want to learn the use of SPSS

## By Chinonso Alwell on June 13th, 2020

Your doing an amazing job,

Your teaching style so easy to grasp.

I want to say a very big thank you.

I would like to make a passionate appeal: want to request SPSS rough file from you. My trier version has expired. I need to practice.

## By Dennis Mwangi on June 20th, 2020

I love the learning!

## By Smitha on June 27th, 2020

I wanted to learn spss. It would be great if an online free certificate course is available on spss