attribute for each person/thing - PBworksallenmath.pbworks.com/f/ONE+AND+TWO+VARIABLE+DATA--lesson.… · Variable –an attribute that can be measured One-variable data sets –give
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Variable – an attribute that can be measured
One-variable data sets – give measures of one
attribute for each person/thing
*examples of situations where you see
one-variable data – tally charts, frequency tables, bar graphs, Histograms, Pictographs,
Circle Charts
Two-variable data sets – give measures of
two attributes for each item in a sample.
*Examples of situations where two-
variable data sets are seen are ordered
pairs, scatter plots, two-column tables
of values
State whether each situation involves one-variable or two-variable data. Justify your
answers.
1) Jesse measures the amount of precipitation
each month in Kitchener.
Solution: you can use mean, median and mode to analyse the data so it is a one-variable
situation (also, there is only one attribute
being measured for each month)
2) The study involves statistics about the poverty level in a community and the level of
education.
Solution: The study involves two pieces of data
for each person/family so it is a two-variable
situation (finding relationships between the variables)
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