Frequency table or grouped 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 Σf represent in statistics?
What does Σf represent in statistics?
Total frequency
Which formula calculates standard deviation?
Which formula calculates standard deviation?
√(Σf(x-μ)²/Σf)
What is the first calculation needed to find the mean from a frequency table?
What is the first calculation needed to find the mean from a frequency table?
Calculate Σfx
When should you use Formula 2?
When should you use Formula 2?
When Σfx² is given
What is the mean if Σfx=45 and Σf=25? Calculate it.
What is the mean if Σfx=45 and Σf=25? Calculate it.
1.8
What is a common mistake in calculations?
What is a common mistake in calculations?
All of the above
What does x represent in the formulas?
What does x represent in the formulas?
Data value
What does Σfx² represent in statistics?
What does Σfx² represent in statistics?
Sum of squared frequencies
Why memorize the formulas?
Why memorize the formulas?
They're not provided
What is the final step in standard deviation?
What is the final step in standard deviation?
Take the square root