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