Standard deviation (AQA 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 does a small standard deviation indicate?
What does a small standard deviation indicate?
Values cluster close to the mean
How is individual deviation calculated?
How is individual deviation calculated?
x - mean
What is the first step in calculating SD?
What is the first step in calculating SD?
Calculate the mean
What does a large standard deviation indicate about data variability?
What does a large standard deviation indicate about data variability?
Data points are widely spread out
Which formula calculates standard deviation?
Which formula calculates standard deviation?
SD = sqrt(sum(x - mean)^2/n)
What is the result of squaring a negative deviation?
What is the result of squaring a negative deviation?
Positive value
What is the correct formula to calculate the mean of a data set?
What is the correct formula to calculate the mean of a data set?
Sum of values divided by count
What is the final step in SD calculation?
What is the final step in SD calculation?
Take the square root
Which formula directly calculates variance using squared values?
Which formula directly calculates variance using squared values?
Variance formula
What is a key property of standard deviation in statistics?
What is a key property of standard deviation in statistics?
It should be positive