One Variable vs. Two
Variable Data
One Variable Data
One-variable data sets give measures of
ONE ATTRIBUTE.
Some Examples…….
You can recognize one-variable
situations when you see:
 Tally charts
 Frequency tables
 Bar graphs
 Histograms
 Pictographs
 Circle graphs
Two Variable Data
Two-variable data sets give measures of
two attributes for each item in a sample.
Some Examples…….
You can recognize two-variable
situations when you see…..
 Ordered pairs
 Scatter plots
 Two-column tables of values
One OR Two Variable Data?
 Noah researches annual hours of
sunshine in Canadian cities
 A study compared the length of time
children spend playing video games and
the time they spend reading
Fill in the blanks……
As population of a city increases,
increases.
As population of a city increases,
decreases.
As temperature increases,
increases.