Eduqas A-Level Psychology A290QS
Biological Approach
Psychodynamic Approach
Behaviourist Approach
Cognitive Approach
Positive Approach
Comparing the Five Approaches
Core Studies in Social and Developmental Psychology
Planning Psychological Research
Data Handling, Statistics and Mathematical Skills
Evaluating and Validating Research
Personal Investigations and Novel Research Scenarios
Addictive BehavioursAddictive
Autistic Spectrum BehavioursAutistic spectrum
Bullying BehavioursBullying
Criminal BehavioursCriminal
SchizophreniaSchizophrenia
StressStress
Controversies in Psychology
Data Handling, Statistics and Mathematical Skills
Mathematical requirements (Appendix A): Calculations for statistical tests
- 3 things to know
- Component 2
Overview
Recall questions on Mathematical requirements: Calculations for statistical tests.
What you need to know
Answer each one before you reveal it.
Using df = (R − 1)(C − 1), a contingency table with 3 rows gives 6 degrees of freedom. How many columns did it have?
A category accounts for 35% of the data. Calculate the angle of its sector in a pie chart.
Questions from this subtopic
Each one with the model answer underneath.
- 1
Condition A totals 90 and condition B totals 60, each across the same 6 participants. Calculate both means and the difference between them.
Model answer
The mean of condition A is 15, the mean of condition B is 10, and the difference between them is 5.
- 2
In a contingency table the row total is 40, the column total is 30 and the grand total is 100. Calculate the expected frequency for that cell.
Model answer
The expected frequency is 40 × 30 ÷ 100 = 12.
- 3
For one cell of a Chi Square table the observed frequency is 18 and the expected frequency is 12. Calculate (O − E)² ÷ E for that cell.
Model answer
The difference is 6, so 6² ÷ 12 = 36 ÷ 12 = 3.
- 4
Using df = (R − 1)(C − 1), a contingency table with 3 rows gives 6 degrees of freedom. How many columns did it have?
Model answer
Since (3 − 1) × (C − 1) = 6, then C − 1 = 3 and the table had 4 columns.
- 5
A category accounts for 35% of the data. Calculate the angle of its sector in a pie chart.
Model answer
The sector angle is 0.35 × 360° = 126°.
- 6
Of 60 respondents, 15 chose one option. Calculate the angle of that sector in a pie chart.
Model answer
15 out of 60 is 25%, so the sector angle is 90°.
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