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Dot Plot, Histogram, pie graph

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  • Why do histogram bars touch?
    Because the graph is broken
    Because the data is grouped into number ranges
  • Which graph is best if you want to see exact scores?
    dot plot
    pie graph
  • What does a pie graph show?
    dots
    Parts of a whole
  • What is one thing a histogram does NOT show clearly?
    Groups of data
    Exact individual values
  • Why is a dot plot helpful?
    It shows exact data values
    It shows hides data
  • If most dots are close together, the data is probably…
    clustered
    spread out
  • If you want to know how many students scored 70 or higher, what should you do?
    Subtract all the bins
    Add the bars for 70 and above
  • If 50% of a pie graph is shaded, that means…
    half the data is shaded
    all the data is shaded
  • A pie graph must add up to…
    100%
    80%
  • A histogram has the tallest bar at 80–89. What does that mean?
    Most data values are in the 80–89 range
    80–89 is the lowest range
  • What does a histogram show?
    Individual dots
    Data in groups or intervals
  • A dot plot has dots at 2, 3, 3, 4, 9. What do you notice?
    9 may be an outlier
    9 is the mode
  • If one number has the tallest stack of dots, what does that usually show?
    The mean
    The mode
  • Which graph would be best to show favorite school lunch choices as parts of the whole class?
    pie graph
    histogram
  • What does each dot usually represent on a dot plot?
    one data point
    one bar
  • If a slice of a pie graph is the biggest, what does that mean?
    If a slice of a pie graph is the biggest, what does that mea
    It represents 50%
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