Transforming data (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 data transformation in statistics?
What is data transformation in statistics?
Changing data values by same amount
Why transform data before calculating the average?
Why transform data before calculating the average?
To make calculations easier
What’s the first step in calculating with transformed data?
What’s the first step in calculating with transformed data?
Transform the data
When adding 5 to every data point, what happens to the mean?
When adding 5 to every data point, what happens to the mean?
It increases by 5
How do you reverse a data transformation that involved subtracting 2?
How do you reverse a data transformation that involved subtracting 2?
Add 2
What multipliers correspond to a 20% increase?
What multipliers correspond to a 20% increase?
1.2
If the original average is 50 and data is multiplied by 2, what is the new average?
If the original average is 50 and data is multiplied by 2, what is the new average?
100
What is the main benefit of data transformation?
What is the main benefit of data transformation?
It simplifies calculations
What should you check after reversing the data transformation?
What should you check after reversing the data transformation?
Answer makes sense
If original data has a mean of 60, what is the mean after subtracting 10?
If original data has a mean of 60, what is the mean after subtracting 10?
50