PSYC2010 28/03/2026 Exam Cheatsheet

Lectures 1 & 2 - In one sample tests…

We are asking whether the mean of our sample is the same as the population mean specificied in the statistical H0.

To answer this, we can either conduct a Z-Test or T-Test:

  • Z-Test - Conducted if the Population Mean and Standard Deviation / Variance are both provided

  • T-Test - Conducted only if the Population Mean is provided

Lecture 3 - In two sample tests…

We are interested in comparing two sample means. The two ways experiments conduct two sample tests are either with a Within Subjects (aka Repeated Measures - The same group of people for each condition) Design or a Between Subjects (aka Independent Groups - A different group of people for each condition) Design.

To calculate whether there was a difference between the two samples, we can conduct a test for each experiment design:

  • Repeated Measures T-Test- Conducted upon the Within Subjects Design, observing the mean difference (average difference score)

  • Independent Groups T-Test- Conducted upon the Between Subjects Design, observing the difference between means (mean for one condition relative to the other condition)

Lecture 4 - In [PLACEHOLDER]…

Lecture 1 Notation

To calculate Mean - The Average Score

  • Sum of all scores divided by the number of scores

To calculate Standard Deviation - The averge distance of every score from the mean

  • Subtract the mean from every score

  • Square those results and sum them up

  • Divide by N-1


Lecture 2 Notation

To calculate standard error of the mean

To calculate sums of squares

Degrees of Freedom

Lecture 3 Notation

To calculate Pooled Variance:

To calculcate Standard Error of the Difference between means:

Lecture 4 Notation

To calculate effect size:

To calculate Power:

Decision Tree and Things to Revise