Estimating the median (AQA GCSE Statistics): Flashcards
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Practise the cards
10 cards from this deck
How to find total frequency from a histogram?
How to find total frequency from a histogram?
Add up all frequencies or calculate using density.
What is the formula for median position?
What is the formula for median position?
Median position = n ÷ 2, where n is total frequency.
How to identify the median class interval?
How to identify the median class interval?
Sum frequencies until reaching or exceeding median position.
What is frequency density formula?
What is frequency density formula?
Frequency density = frequency ÷ class width.
Estimate median for 37 total frequency?
Estimate median for 37 total frequency?
Median position = 37 ÷ 2 = 18.5.
How to find the width of a median class interval?
How to find the width of a median class interval?
Width = (Upper limit - Lower limit) of the class.
What to do after finding median class?
What to do after finding median class?
Use linear interpolation to estimate the median.
Why is frequency density important?
Why is frequency density important?
It shows frequency on y-axis of histograms.
How to check median estimate makes sense?
How to check median estimate makes sense?
Ensure it lies within the identified median class.
How do you find the median in grouped data?
How do you find the median in grouped data?
Use the formula: L + (n/2 - F) / f * w.