Grouped continuous data (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 the standard deviation estimate?
What does the standard deviation estimate?
Spread of grouped data
What is the first step in calculation?
What is the first step in calculation?
Find mid-points
What does fD represent in the table?
What does fD represent in the table?
Frequency times mid-point
Why do we use mid-points?
Why do we use mid-points?
To represent all values
What is the formula for standard deviation?
What is the formula for standard deviation?
Square root of variance
What does the notation ΣfD² indicate in statistics?
What does the notation ΣfD² indicate in statistics?
Sum of frequencies times squared deviations
What is the effect of wider class intervals on data detail in statistics?
What is the effect of wider class intervals on data detail in statistics?
They obscure data details
What is the final step in the calculation?
What is the final step in the calculation?
Apply standard deviation formula
Why is the result an estimate?
Why is the result an estimate?
Mid-points are used
What should you always show in calculations?
What should you always show in calculations?
Working and totals