Describe Best Practices for Planning and Creating Effective Data Visualizations DATA-SCIENCE-FOUNDATIONS Practice Questions (Page 3)

Questions 11–15

1. 11application · medium

   A regional sales manager needs a quarterly dashboard to present to the executive team. The executives are primarily interested in identifying which of the six product lines underperformed relative to their targets. The manager has the actual sales and target figures for each product line. Which visualization approach best serves this audience and purpose?

   • AA line chart plotting sales over the four quarters for each product line
   • BA scatter plot of actual sales against target sales for all product lines
   • CA grouped bar chart showing actual versus target sales for each product line
   • DA pie chart showing each product line's share of total actual sales
   Reveal Solution Discussion Select an answer first
2. 12expert · hard

   A team has developed a new sales dashboard. In a usability test, the sales team successfully finds the information they need, but they complain that the dashboard 'feels slow' and they have to scroll to see the main chart. The team has a tight deadline and limited development resources. What is the most effective way to address this feedback?

   • ARedesign the entire dashboard from scratch to fix all issues at once
   • BAdd more charts to the dashboard to make it more comprehensive
   • CPrioritize moving the main chart above the fold and defer other layout changes
   • DIgnore the scrolling complaint since the users can still find the information
   Reveal Solution Discussion Select an answer first
4. 13foundation · easy

   A data analyst is creating a visualization for a technical audience of data engineers. The goal is to show the exact distribution of response times across servers. Which statement best describes the primary purpose of this visualization?

   • ATo compare response times across different geographic regions
   • BTo persuade stakeholders to invest in new servers
   • CTo provide a high-level summary for a broad audience
   • DTo enable detailed analysis of the response time distribution
   Reveal Solution Discussion Select an answer first
5. 14application · medium

   An analyst is building a visualization from a dataset that was compiled from three different regional databases. The analyst notices that the 'date' column is formatted differently in each source (e.g., MM/DD/YYYY vs. DD-MM-YYYY). What is the most important step before creating the visualization?

   • AConvert all dates to text to avoid any formatting issues
   • BStandardize the date format across all records and verify the values are interpreted correctly
   • CRemove the date column and use the row number as the x-axis
   • DUse the date column as-is, since the visualization tool will handle the formatting
   Reveal Solution Discussion Select an answer first
6. 15foundation · easy

   Before designing a data visualization, a data scientist identifies the primary audience as executive stakeholders who need to quickly grasp the overall trend in quarterly sales. Which action best reflects defining the visualization goal?

   • ASelecting a color palette that matches the company brand
   • BEnsuring the data source is a trusted internal database
   • CDeciding to use a scatter plot to show the relationship between marketing spend and sales
   • DDetermining that the visualization should highlight the sales trend over time for a non-technical audience
   Reveal Solution Discussion Select an answer first