Describe Best Practices for Planning and Creating Effective Data Visualizations DATA-SCIENCE-FOUNDATIONS Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   A non-profit organization wants to show donors the growth of its fundraising over the past 10 years. The audience is the general public, and the goal is to inspire continued giving. Which visualization is most effective for this purpose?

   • AA scatter plot of donations against the year number
   • BA line chart showing the upward trend of donations year over year
   • CA pie chart showing the proportion of donations from each year
   • DA bar chart of donations for each year, with the y-axis starting at 50% of the minimum value
   Reveal Solution Discussion Select an answer first
2. 2expert · hard

   A financial analyst is building a dashboard to show quarterly revenue. The raw data contains a 'revenue' column and a 'quarter' column. The analyst discovers that the 'revenue' column includes both gross revenue and net revenue entries, but there is no flag to distinguish them. What is the most important first step?

   • ASeparate the values into two charts based on the value's magnitude
   • BCreate the chart using all the revenue values as-is
   • CCalculate the average of all revenue values and use that for the chart
   • DTrace the data lineage back to the source systems to understand how the revenue values were generated
   Reveal Solution Discussion Select an answer first
4. 3foundation · easy

   A data scientist wants to show the relationship between two continuous variables, such as advertising spend and revenue, to identify if a correlation exists. Which chart type is most appropriate?

   • APie chart
   • BLine chart
   • CBar chart
   • DScatter plot
   Reveal Solution Discussion Select an answer first
5. 4foundation · easy

   A manager wants to compare the total sales across five product categories. Which chart type is most appropriate for this comparison?

   • AHistogram
   • BBar chart
   • CLine chart
   • DScatter plot
   Reveal Solution Discussion Select an answer first
6. 5application · medium

   A retail chain wants to compare the total sales revenue of its five store regions. The regions are categorical, and the revenue is a continuous numerical value. Which chart type is the most appropriate for this comparison?

   • AA line chart with regions on the x-axis and revenue on the y-axis
   • BA histogram of the revenue values
   • CA bar chart with regions on the x-axis and revenue on the y-axis
   • DA scatter plot with regions on the x-axis and revenue on the y-axis
   Reveal Solution Discussion Select an answer first