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
Significant figures, estimation and the range
- 3 things to know
- Component 01
Overview
Recall questions on rounding to significant figures and decimal places, counting significant figures, reporting results sensibly, estimation, finding the range, estimating a mean from a total, and keeping raw data after a study.
What you need to know
Answer each one before you reveal it.
The highest score in a data set is 47 and the lowest is 12. State the range.
Why should a calculated result not be reported to more significant figures than the original data?
Questions from this subtopic
Each one with the model answer underneath.
- 1
Express 0.0384 to two significant figures.
Model answer
It is 0.038.
- 2
Express 0.04728 to three significant figures.
Model answer
It is 0.0473.
- 3
Express a correlation coefficient of 0.61538 to two decimal places.
Model answer
It is 0.62.
- 4
How many significant figures does the value 0.00560 have?
Model answer
It has three significant figures.
- 5
Why do the zeros in front of the first non-zero digit not count as significant figures?
Model answer
They only fix the position of the decimal point and carry no information about how precisely the value was measured.
- 6
Why should a calculated result not be reported to more significant figures than the original data?
Model answer
Extra figures suggest a level of precision that the original measurements never had.
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