Measures of dispersion for discrete 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 does the range measure in data dispersion?
What does the range measure in data dispersion?
Total spread of data
How do you find the position of Q1 in ordered data?
How do you find the position of Q1 in ordered data?
(n+1)/4
What is the key advantage of using the interquartile range?
What is the key advantage of using the interquartile range?
Insensitive to outliers
Why arrange data in ascending order before calculating quartiles?
Why arrange data in ascending order before calculating quartiles?
Required for accurate Q1 and Q3
In a data set, if the smallest value is 5 and the largest is 20, what is the range?
In a data set, if the smallest value is 5 and the largest is 20, what is the range?
15
What does Q2 represent in a data set?
What does Q2 represent in a data set?
Median value
When calculating Q3 position, which formula do you use?
When calculating Q3 position, which formula do you use?
3(n+1)/4
What is a disadvantage of using the range as a measure of dispersion?
What is a disadvantage of using the range as a measure of dispersion?
Affected by outliers
How does the IQR help in understanding data spread?
How does the IQR help in understanding data spread?
Shows spread of middle 50%
What must you do if your data is not in order before finding quartiles?
What must you do if your data is not in order before finding quartiles?
Arrange in ascending order