Quality assurance and control charts (AQA GCSE Statistics): Flashcards
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Practise the cards
10 cards from this deck
What is the purpose of quality control in manufacturing?
What is the purpose of quality control in manufacturing?
To ensure products meet standards without testing all items.
How do you calculate the sample mean?
How do you calculate the sample mean?
Sum the measurements and divide by the number of items.
What does a control chart visualize?
What does a control chart visualize?
It shows how sample means perform over time.
What is the target mean symbol in quality control?
What is the target mean symbol in quality control?
The target mean is represented by the symbol (mu).
What percentage of sample means fall within warning limits?
What percentage of sample means fall within warning limits?
Approximately 95% of sample means fall within these limits.
What action is taken if a sample mean is outside action limits?
What action is taken if a sample mean is outside action limits?
Stop the machine, check for issues, and reset the process.
What do warning limits represent in quality control?
What do warning limits represent in quality control?
They are set at from the target mean .
What should you do if a sample mean is between limits?
What should you do if a sample mean is between limits?
Take another sample to check for random variation.
What does a 0.2% probability indicate about a sample mean?
What does a 0.2% probability indicate about a sample mean?
It suggests the result is unlikely due to chance.
What does a sample mean of 18.35mm indicate?
What does a sample mean of 18.35mm indicate?
It represents the average measurement of the sample.