WJEC A-Level Psychology 601-5719-7
Psychology Past to Present — The Five Approaches
Contemporary Debates
Principles of Research and Application of Research Methods
Mathematical Requirements for Psychology (Appendix A: AS Unit 2 and A2 Unit 4)
Addictive BehavioursAddictive
Autistic Spectrum BehavioursAutistic spectrum
Bullying BehavioursBullying
Criminal BehavioursCriminal
SchizophreniaSchizophrenia
StressStress
Controversies in Psychology
Applied Research Methods
Mathematical Requirements for Psychology (Appendix A: AS Unit 2 and A2 Unit 4)
Arithmetic and Numerical Computation: standard form and significant figures
- 4 things to know
- AS Unit 2 and A2 Unit 4
Overview
Recall questions on standard form and significant figures.
What you need to know
Answer each one before you reveal it.
A results table gives category totals in standard form. Why are they usually converted to decimal form before a pie chart is constructed from them?
A reaction-time study records a mean latency of 0.0042 s. What is this in standard form?
A correlation coefficient is calculated as −0.71638. What is it to two significant figures, and to three?
Questions from this subtopic
Each one with the model answer underneath.
- 1
A reaction-time study records a mean latency of 0.0042 s. What is this in standard form?
Model answer
The mean latency is 4.2 × 10⁻³ s.
- 2
A results table gives a participant's detection threshold as 3.5 × 10⁻² s. What is this in decimal form?
Model answer
The threshold is 0.035 s.
- 3
A content analysis logged 1.25 × 10³ codable utterances. How many utterances is that in decimal form?
Model answer
It is 1250 utterances.
- 4
A researcher screens 48 000 archived records in a secondary-data study. How is that number written in standard form?
Model answer
The researcher screens 4.8 × 10⁴ records.
- 5
Which is the longer response time, 6.3 × 10⁻³ s or 8.1 × 10⁻⁴ s?
Model answer
6.3 × 10⁻³ s is longer, because it equals 0.0063 s whereas 8.1 × 10⁻⁴ s equals only 0.00081 s.
- 6
State the rule a number must follow to be correctly written in standard form as a × 10ⁿ.
Model answer
The value of a must be at least 1 and less than 10, and n must be an integer, which may be positive, negative or zero.
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 Mathematical Requirements for Psychology (Appendix A: AS Unit 2 and A2 Unit 4), 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.