Data visualization and presentation Flashcards
use labels or names
to identify categories of like items.
Categorical data
are numerical values
that indicate how much or how many.
Quantitative data
A _____ is a tabular summary of
data showing the frequency (or number) of items
in each of several non-overlapping classes
frequency distribution
The objective is to ______ about the data
that cannot be quickly obtained by looking only at
the original data
provide insights
The _________ of a class is the fraction or
proportion of the total number of data items
belonging to the class.
relative frequency
A _________ is a tabular
summary of a set of data showing the relative
frequency for each class.
Relative Frequency Distribution
relative frequency distribution
The ___________ of a class is the relative
frequency multiplied by 100
percent frequency
A ___________ is a tabular
summary of a set of data showing the percent
frequency for each class.
percent frequency distribution
A _______ is a graphical device for depicting
qualitative data.
bar chart
A ________________
scale can be used for the other axis (usually the
vertical axis)
frequency, relative frequency, or percent frequency
Using a ______ drawn above each class
label, we extend the height appropriately
bar of fixed width
The ________ to emphasize the fact that each
class is a separate category.
bars are separated
When the bars are arranged in descending order of
height from left to right (with the most frequently
occurring cause appearing first) the bar chart is
called a
Pareto Diagram
The ________ is a commonly used graphical device
for presenting relative frequency and percent
frequency distributions for categorical data.
pie chart
Formula for class width
2^k>n
Another common graphical presentation of
quantitative data is a
histogram
shows the
number of items with values less than or equal to the
upper limit of each class.
Cumulative frequency distribution
shows
the proportion of items with values less than or
equal to the upper limit of each class.
Cumulative relative frequency distribution
shows
the percentage of items with values less than or
equal to the upper limit of each class.
Cumulative percent frequency distribution
_______ and _________ a are two
methods for summarizing the data for two variables
simultaneously
Crosstabulation and scatter diagram
A _________ is a tabular summary of data for
two variables.
crosstabulation
A ________ is a graphical presentation of the
relationship between two quantitative variables.
scatter diagram
A ___________ provides an approximation of the
relationship.
trendline
