OCR A-Level Psychology H567
Research Methods and Techniques
Planning and Conducting Research
Data Recording, Analysis and Presentation
Report Writing and Scientific Communication
Practical Activities and the Nature of Science
Mathematical Requirements for Research Methods
Studying and Evaluating the Core Studies: The Common Framework
Core Studies: Social Area
Core Studies: Cognitive Area
Core Studies: Developmental Area
Core Studies: Biological Area
Core Studies: Individual Differences Area
Areas and Perspectives in Psychology
Debates in Psychology
Practical Applications of Psychology
Issues in Mental Health
Child PsychologyApplied option
Criminal PsychologyApplied option
Environmental PsychologyApplied option
Sport and Exercise PsychologyApplied option
Methodological Issues and Debates Running Through Applied Psychology
Data Recording, Analysis and Presentation
Degrees of freedom, choosing a test and mathematical symbols
- 2 things to know
- Component 01
Overview
Recall questions on degrees of freedom for Chi-square, the three questions for choosing an inferential test, and the mathematical symbols ∝, ~, < and << used to report relationships and significance.
What you need to know
Answer each one before you reveal it.
What three questions determine which inferential test should be chosen?
Questions from this subtopic
Each one with the model answer underneath.
- 1
How are the degrees of freedom found for a Chi-square test?
Model answer
One less than the number of rows is multiplied by one less than the number of columns in the contingency table.
- 2
A contingency table has two rows and three columns. Calculate the degrees of freedom.
Model answer
There are 2 degrees of freedom.
- 3
What three questions determine which inferential test should be chosen?
Model answer
Whether the study tests a difference or a correlation, whether the design is related or unrelated, and the level of measurement of the data.
- 4
A researcher writes that recall ∝ revision time. What claim is being made?
Model answer
That recall is directly proportional to revision time, so doubling the time spent revising would be expected to double the amount recalled.
- 5
What does the symbol ~ mean when used with a value?
Model answer
It means that the value is approximately equal to the one given.
- 6
Distinguish between the symbols < and <<.
Model answer
The symbol < means less than, whereas << means very much less than.
Other ways to work this
The same content, four other ways.
What is inside Levo
Six ways to work the same material.
Every question in Data Recording, Analysis and Presentation, on a schedule.
Attempt a question from memory, write the correct version, then attempt it again. Levo records the jump between your first attempt and your last, and brings each question back on the day you are due to forget it.
Or £46 a year, about £3.83 a month. Cancel anytime.