Frequency Distributions (Junior Cert Mathematics): 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 is a grouped frequency distribution?
What is a grouped frequency distribution?
Data grouped into intervals or ranges
Why do we use grouped frequency distributions for large data sets?
Why do we use grouped frequency distributions for large data sets?
They simplify and organise the data
What is the mid-interval value?
What is the mid-interval value?
The middle point of each interval
How do you calculate the mid-interval value?
How do you calculate the mid-interval value?
Add lowest & highest, divide by 2
What is the mid-interval value for the interval ?
What is the mid-interval value for the interval ?
What is Step 1 when calculating the mean for grouped data?
What is Step 1 when calculating the mean for grouped data?
Multiply mid-interval by frequency
After multiplying mid-intervals by frequencies, what do you divide by to find the mean?
After multiplying mid-intervals by frequencies, what do you divide by to find the mean?
The total frequency
What is cumulative frequency?
What is cumulative frequency?
Adding frequencies as you go down
How do you find the median for grouped data?
How do you find the median for grouped data?
Find interval with middle value
What is the modal class?
What is the modal class?
Interval with highest frequency
How do you find the mode for grouped data?
How do you find the mode for grouped data?
Use mid-interval of modal class
Why are mid-interval values important?
Why are mid-interval values important?
They represent the entire interval