Unit 4: Data Plotting and Visualization - Practice Quiz

1 What is the main purpose of data visualization?

2 Which benefit is commonly associated with data visualization?

3 Who can use data visualizations to support decision-making?

4 What does visual encoding mean in data visualization?

5 Which visual property is often used to distinguish categories?

6 In a bubble chart, which visual property commonly represents a numerical value?

7 Which software is widely used to create interactive dashboards?

8 Which Microsoft product is designed for business intelligence and data visualization?

9 What is a dashboard in data visualization software?

10 Which Python library is commonly used for basic plotting?

11 Which Python library provides high-level statistical visualizations and is built on Matplotlib?

12 Which JavaScript library is known for creating custom, web-based data visualizations?

13 Which spreadsheet application can create basic charts from tabular data?

14 Which feature is typically used to identify the meaning of colors or symbols in a chart?

15 Which chart element displays the measurement scale along an edge of a graph?

16 Which feature allows users to explore a visualization by selecting or filtering data?

17 What does a tooltip commonly show in an interactive chart?

18 Which chart is most suitable for comparing values across categories?

19 Which chart is commonly used to display a trend over time?

20 Which visualization is commonly used to examine the relationship between two numerical variables?

21 An analyst has a table containing daily website traffic for three years. What is the main benefit of visualizing the data before building a forecasting model?

22 A bar chart comparing sales of four products starts its vertical axis at instead of . Sales range from to . What is the primary concern?

23 Which visual encoding is generally most effective for comparing precise quantitative values across categories?

24 A scatter plot already uses horizontal and vertical position for two quantitative variables. Which encoding is most appropriate for distinguishing four unordered customer segments?

25 In a bubble chart, population is represented by circle size. If City B has four times the population of City A, how should their circles be scaled?

26 A business analyst with limited programming experience must combine database data and create an interactive dashboard with filters. Which tool is most suitable?

27 An organization primarily uses Microsoft 365 and needs dashboards with scheduled refreshes and role-based sharing. Which software best fits this environment?

28 A Python developer needs detailed control over axes, annotations, and export settings for a static publication figure. Which library is the best starting point?

29 A data scientist wants to compare score distributions across departments using concise Python code and visually appealing statistical defaults. Which library is most appropriate?

30 A web report requires a Python-generated scatter plot with zooming, panning, and hover tooltips. Which library is most suitable?

31 A manager wants to compare total quarterly revenue across six product categories. Which basic chart is most appropriate?

32 A histogram of customer ages looks highly irregular because it contains 100 bins for only 200 observations. What is the best adjustment?

33 Which chart should be used to examine whether advertising expenditure is associated with sales revenue across 80 stores?

34 A company wants to display monthly electricity consumption over five consecutive years. Which visualization type best emphasizes change over time?

35 A single scatter plot becomes cluttered when points from twelve regions overlap. Which technique best supports regional comparison while preserving the same axes?

36 An analyst wants to inspect correlations among 25 numerical variables before feature selection. Which visualization is most appropriate?

37 A public-health analyst maps disease cases by county, but county populations vary greatly. Which value should be encoded in a choropleth map?

38 A researcher needs to compare medians, variability, and potential outliers in salaries across five departments. Which visualization type is most suitable?

39 A logistics analyst wants to show how shipment volume moves from factories to warehouses and then to stores. Which visualization type is most appropriate?

40 An analyst needs to explore individual cars using fuel economy, price, horsepower, weight, and emissions simultaneously. Which advanced visualization is most suitable?

41 Seven algorithms receive ordinal performance ratings from 1 to 7. The main task is detecting small differences between algorithms. Which encoding best supports this task?

42 A bubble chart must encode values using circle area. Which radius function produces areas proportional to the values?

43 A map displays signed deviations from a policy target, ranging from to , with zero having substantive meaning. Which color strategy is most appropriate?

44 A line chart must remain interpretable for viewers with color-vision deficiencies and when printed in grayscale. Which design is most robust?

45 An overall outcome rises over time even though it falls within every demographic subgroup because subgroup proportions change. Which visualization most directly exposes the mechanism?

46 A quantity increases from 40 to 60, while its graphical bar length increases from 2 cm to 8 cm. Using the lie factor , what is ?

47 A dashboard shows a model estimate as a precise line even though uncertainty grows sharply near the domain boundaries. Which revision best prevents overconfident interpretation?

48 An organization needs governed dashboards with row-level security and hourly updates, but direct dashboard queries overload its transactional database. Which architecture best fits?

49 A team wants reviewable visualization specifications that declare mappings, transformations, and interactions and can be compiled to web graphics. Which software model best matches?

50 Four Matplotlib heatmaps must use identical colors for identical values, although each matrix has a different local range. What is the essential implementation choice?

51 A Seaborn line plot contains repeated measurements from many subjects. The default mean line hides heterogeneous individual trajectories. Which change best reveals those trajectories?

52 A browser dashboard must display the changing density of 50 million GPS points during zooming; individual-point hover is unnecessary. Which approach is most scalable?

53 Two groups must be compared with histograms, but their sample ranges differ and the apparent conclusion changes when bin origins shift. Which design gives the most defensible comparison?

54 Two continuous distributions have similar centers but may differ in their upper tails. The analyst wants a comparison without choosing histogram bins or kernel bandwidths. Which plot is best?

55 A scatterplot of two continuous variables contains 800,000 observations, causing severe overplotting. The goal is to compare local observation counts rather than individual records. Which type is most suitable?

56 In a coordinated multiple-view system, selecting points in a scatterplot must highlight the same records after another view is sorted or filtered. What implementation is required?

57 A parallel-coordinates plot compares variables measured in dollars, percentages, and milliseconds. One high-variance variable visually dominates all others. Which preprocessing is most appropriate?

58 A choropleth maps reported disease case counts by county. Large-population counties appear most severe even when individual risk is low. Which revision addresses the primary confounder?

59 A bootstrap distribution for an estimator is strongly right-skewed. Which visualization communicates its uncertainty without incorrectly imposing symmetry?

60 A rasterized density visualization aggregates records into one value per pixel. Which analytical limitation must be considered when interpreting a low-intensity region?