QTM 100 EXAM 1 PRACTICE STUDY QUESTIONS
Stacked bar plot - Answers - shows part to whole relationships
Stacked bar plot - Answers - compact; fits a lot of information
Stacked bar plot - Answers - hard to see and compare subcategories
Stacked bar plot - Answers - use it when total size matters+when composition is
interesting but exact comparisons between subcategories aren't critical
Side by side bar plot - Answers - good or direct comparisons between subcategories
Side by side bar plot - Answers - doesn't show totals+naturally takes a lot of horizontal
space
Side by side bar plot - Answers - use it when comparing subcategories against one
another
Side by side bar plot - Answers - when you care a lot about differences, not proportions
Standardized stacked bar plot - Answers - good at highlighting differences in
proportions across groups+good for percentage based stories
Standardized stacked bar plot - Answers - you lose all information about size
Standardized stacked bar plot - Answers - use it when proportions matter more than
counts
Bar plots - Answers - categorical variables are represented on the x-axis
Bar plots - Answers - there are gaps between the bars+data can be arranged in any
order
Histograms - Answers - numerical variables are represented on the x-axis
Histograms - Answers - no gaps between bars+ data is arranged in the order of
magnitude
Z score - Answers - the # of standard deviations an observation falls above or below the
mean
Μ - Answers - population mean
Σ - Answers - (sigma) population standard deviation
Stacked bar plot - Answers - shows part to whole relationships
Stacked bar plot - Answers - compact; fits a lot of information
Stacked bar plot - Answers - hard to see and compare subcategories
Stacked bar plot - Answers - use it when total size matters+when composition is
interesting but exact comparisons between subcategories aren't critical
Side by side bar plot - Answers - good or direct comparisons between subcategories
Side by side bar plot - Answers - doesn't show totals+naturally takes a lot of horizontal
space
Side by side bar plot - Answers - use it when comparing subcategories against one
another
Side by side bar plot - Answers - when you care a lot about differences, not proportions
Standardized stacked bar plot - Answers - good at highlighting differences in
proportions across groups+good for percentage based stories
Standardized stacked bar plot - Answers - you lose all information about size
Standardized stacked bar plot - Answers - use it when proportions matter more than
counts
Bar plots - Answers - categorical variables are represented on the x-axis
Bar plots - Answers - there are gaps between the bars+data can be arranged in any
order
Histograms - Answers - numerical variables are represented on the x-axis
Histograms - Answers - no gaps between bars+ data is arranged in the order of
magnitude
Z score - Answers - the # of standard deviations an observation falls above or below the
mean
Μ - Answers - population mean
Σ - Answers - (sigma) population standard deviation
