Averages from tables 2 (Edexcel GCSE Maths): Quizzes
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Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What are class intervals in a frequency table?
What are class intervals in a frequency table?
Data grouped into ranges
Why can you only calculate estimates of the mean from grouped data?
Why can you only calculate estimates of the mean from grouped data?
You don't know the exact data values
What is the modal class interval?
What is the modal class interval?
Class interval with highest frequency
What is the modal class interval?
What is the modal class interval?
The range where the mode is located
How do you find the median position in grouped data?
How do you find the median position in grouped data?
How do you calculate the mid-point of a class interval?
How do you calculate the mid-point of a class interval?
(lowest value + highest value) 2
What is the mid-point method used for?
What is the mid-point method used for?
Estimating the mean from grouped data
What is the formula for estimated mean from grouped data?
What is the formula for estimated mean from grouped data?
Total of Total frequency
What does represent in the calculation?
What does represent in the calculation?
Frequency multiplied by mid-point
Why is the calculated mean an estimate with grouped data?
Why is the calculated mean an estimate with grouped data?
You assume all values equal the mid-point
When calculating estimated mean, what should you divide by?
When calculating estimated mean, what should you divide by?
Total frequency
Which frequency value helps identify the modal class interval?
Which frequency value helps identify the modal class interval?
The highest frequency