Sample medians and sample ranges (Edexcel GCSE Statistics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the purpose of using sample medians in quality control charts?
What is the purpose of using sample medians in quality control charts?
To monitor central tendency
How do you find the median in a sample?
How do you find the median in a sample?
Arrange in order and pick middle
What does a control chart using sample ranges primarily monitor?
What does a control chart using sample ranges primarily monitor?
Variability or spread
Why is the range useful in quality control?
Why is the range useful in quality control?
Helps spot variability
What does a large range in a sample suggest?
What does a large range in a sample suggest?
High variability
What is the target weight of a cake in a control chart example?
What is the target weight of a cake in a control chart example?
125g
What is one advantage of using range in quality control?
What is one advantage of using range in quality control?
Quicker to calculate
What should a student do to show working when calculating a range?
What should a student do to show working when calculating a range?
Write highest minus lowest
What is the main difference between mean and median control charts?
What is the main difference between mean and median control charts?
Center of distribution
Sample cake weights 122, 129, 126, 124, 128. Target 125g, σ=3.5g. Is the sample median within warning limits?
Sample cake weights 122, 129, 126, 124, 128. Target 125g, σ=3.5g. Is the sample median within warning limits?
Yes — median within warning limits