Video Transcript
A pie chart is best used to display
data when you want to do which of the following? Is it (A) show how data changes
over time, (B) compare the frequency of data grouped into equal intervals, (C) see
the correlation in data, or (D) compare parts of the data to the whole.
We recall that a pie chart is a
circle split into different sections as shown. If we consider the entire circle to
be the whole, the data has been split into fractions or percentages. This means that a pie chart enables
us to compare parts of the data to the whole. Option (D) is the correct
answer.
If we consider the wrong answers,
option (A) wanted us to show how data changes over time. In order to do this, we would use a
line graph or line plot. In option (B), we wanted to compare
the frequency of data grouped into equal intervals. This will be done using a bar graph
or a pictograph. In order to see the correlation
between two data sets, we would need to draw a scatter diagram or scatter graph. This means that option (A), option
(B), and option (C) are incorrect. A pie chart is best used to display
data when comparing parts of the data to the whole.
