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 mode
The mean
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 hides data
It shows exact data values
If most dots are close together, the data is probably…
clustered
spread out
What does a histogram show?
Data in groups or intervals
Individual dots
Why do histogram bars touch?
Because the data is grouped into number ranges
Because the graph is broken
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
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?
Groups of data
Exact individual values
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?
It represents 50%
If a slice of a pie graph is the biggest, what does that mea
A pie graph must add up to…
100%
80%
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
