Easy1 markMultiple Choice
AQA GCSE · Question 04 · Planning and Designing Statistical Investigations
Which statistical term means 'the extent to which something gives results that are consistent'?
Which statistical term means 'the extent to which something gives results that are consistent'?
Answer options:
A.
reliability
B.
validity
C.
standard deviation
D.
unbiased
How to approach this question
Recall the definitions of the key statistical terms provided. The question is asking for the term that relates to consistency of results. Match this definition to one of the options.
Full Answer
A.reliability✓ Correct
The correct answer is reliability.
**Reliability** is about the consistency of a measurement. If you were to repeat the measurement or experiment under the same conditions, would you get the same or very similar results? For example, a reliable weighing scale will show the same weight each time you step on it (within a very small margin). \n**Validity**, in contrast, is about accuracy. It assesses whether the measurement actually captures what it is intended to capture. The weighing scale might be reliable (consistent) but not valid if it is consistently off by 2 kg.
Common mistakes
✗ Confusing reliability with validity. This is a very common mistake. Remember: Reliability = Consistency, Validity = Accuracy.
Practice the full AQA GCSE Statistics Higher Tier Paper 2
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