bar and pie charts intro to stats
Which one is better?
It depends on the situation.
Vilfredo Pareto
Italian mathematician arrange bar charts by ascending, descending order so more aesthetically pleasing
pie chart
a type of graph in which a circle is divided into sectors that each represent a proportion of the whole. COMMON VARIABLE
squigly line
above zero on bar graph. used to skip values.
similarity between bar and pie chart
both show distribution of categorical data.
x axis represents
categorical variable
rule for converting pie chart to bar graph
every pie chart can be a bar graph but not every bar graph can be a pie chart, when data is "not part of a whole"
bar graph
graph that displays frequency of a categorical variable. shows values for each bar next to each other for easy comparison.
Pareto bar graph
orders bars by increasing or decreasing order left to right.
difference between bar and pie chart
pie chart compares parts of a whole sample or pop. bar graph are for comparing groups of the same units or tracking change over time.
y axis represents
quantitative variable
what to include with bar graph
title, axes labels, scale, bars source
what to include with pie chart
title, labels, percentages, source