The shape of a distribution (AQA GCSE Statistics): Flashcards
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Practise the cards
10 cards from this deck
What does the shape of a distribution indicate?
What does the shape of a distribution indicate?
It shows how data values are spread out visually.
What is a positively skewed distribution?
What is a positively skewed distribution?
Most data clusters at lower values, tail points right.
How do you identify a symmetrical distribution?
How do you identify a symmetrical distribution?
Data is evenly spread around the middle point.
What characterizes a negatively skewed distribution?
What characterizes a negatively skewed distribution?
Most data is at higher values, tail points left.
What do tails in distributions indicate about data values?
What do tails in distributions indicate about data values?
They show the extremes of data, beyond the mean range.
How to create a back-to-back stem and leaf diagram?
How to create a back-to-back stem and leaf diagram?
Use tens as stems, units as leaves on both sides.
What is the key step in drawing frequency polygons?
What is the key step in drawing frequency polygons?
Plot frequencies at the midpoint of grouped intervals.
What does a positive skew indicate about data?
What does a positive skew indicate about data?
Most data is at lower values with a right tail.
What should you remember about symmetrical distributions?
What should you remember about symmetrical distributions?
They have equal amounts of data on both sides.
Why plot at midpoints in frequency polygons?
Why plot at midpoints in frequency polygons?
To ensure accurate representation of data distribution.