Stem & Leaf Plots (Leaving Cert Mathematics): Flashcards
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13 cards from this deck
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Practise the cards
13 cards from this deck
Stem & leaf diagram purpose
Stem & leaf diagram purpose
Presents data by breaking numbers into stem and leaf parts; groups similar numbers together
Stem in stem & leaf diagram
Stem in stem & leaf diagram
Leading digit(s) of the number
Leaf in stem & leaf diagram
Leaf in stem & leaf diagram
Final digit of the number
Stem represents which digit? (e.g., 30s, 40s)
Stem represents which digit? (e.g., 30s, 40s)
Tens digit
Leaves represent which digit?
Leaves represent which digit?
Ones digits
Key notation: means?
Key notation: means?
31 (stem combined with leaf)
First step: Constructing stem & leaf diagram
First step: Constructing stem & leaf diagram
Identify the stems (first digit/digits)
Organizing leaves in stem & leaf diagram
Organizing leaves in stem & leaf diagram
Order the leaves in increasing order for each stem
Definition of median
Definition of median
Middle number in an ordered list of data
Median with even number of data points
Median with even number of data points
Average of the two middle numbers
What does measure?
What does measure?
Spread of middle 50% of data
Key advantage of stem & leaf diagrams
Key advantage of stem & leaf diagrams
Keeps original data; no data is lost
Key disadvantage of stem & leaf diagrams
Key disadvantage of stem & leaf diagrams
Impractical for very large data sets