C797 data science and analytics Study
Guide
Column charts - ✔Use to compare data across categories( requires categorical or
ordinal data, displays variables vertically)
Line graphs - ✔Use to display continuous data over time
Histogram - ✔Use to visually display normality ( normal distribution of
continuous/quantitative /frequency of data around the mean) for a set of data points
Pie charts - ✔Use when you have one row or column of data and you want to know how
much one data point is in relation to the whole. Especially useful when displaying
portions or percentages
bar chart - ✔Similar to column charts but better to use when your labels are long (
categorical or ordinal data, there are spaces between bars and it is displayed
horizontally)
x-y scatter plot - ✔Shows the relationship among numeric values in several data series,
or plot two groups of numbers as one series of XY coordinates ( requires continuous
data)
donut chart - ✔Show the relationship of parts to a whole like a pie chart but can contain
more than one data series( can be continuous or categorical sections of a whole)
Bubble charts - ✔Are continuous data that are arranged in columns on a worksheet so
that the X values are listed in the first column and the corresponding Y values and
bubble size values s are listed in adjacent columns.
Geospatial maps - ✔Visually depict the prevalence and occurrence of a condition or
disease geographically using polygons. The are 2 types of data used in mapping- vector
data and raster data
Raster Data - ✔A grid-based format for storing location-based data in a geographic
information system in which each equally-sized cell or pixel contains a value that
represents geographic data such as land.
Vector Data - ✔A format for storing location-based data in a geographic information
system that uses latitude and longitude coordinates to represent geographic features
with points, lines, and other complex shapes.
