Perception and Visualization DATA-SCIENCE-OPTIMIZE Practice Questions (Page 6)

Questions 26–28

1. 26application · medium

   A data analyst needs to visualize the ranking of 15 sales representatives by total sales. The analyst wants to make it easy to compare the exact sales values and identify the top performers. Which visual encoding and chart type are most appropriate?

   • AHorizontal bar chart with sales on the x-axis and representative names on the y-axis
   • BPie chart with each representative as a slice
   • CBubble chart with sales as bubble size
   • DLine chart with representatives on the x-axis and sales on the y-axis
   Reveal Solution Discussion Select an answer first
2. 27application · medium

   A marketing analyst is creating a dashboard for a campaign performance review. The dashboard currently includes: a 3D pie chart of channel spend, a line chart with 15 different metrics, a table with 50 rows of raw data, and a bar chart of top 5 campaigns. The analyst wants to reduce cognitive load. Which change is most effective?

   • AAdd gridlines and borders to every chart to improve clarity
   • BKeep all elements but add more colors to make the dashboard more engaging
   • CIncrease the size of the table so all 50 rows are clearly visible
   • DReplace the 3D pie chart with a simple 2D bar chart and reduce the line chart to the top 5 key metrics
   Reveal Solution Discussion Select an answer first
3. 28foundation · easy

   Which visual encoding is best suited to represent the relationship between two continuous numerical variables in a scatter plot?

   • ALength of bars
   • BPosition on both axes
   • CAngle of slices
   • DColor intensity
   Reveal Solution Discussion Select an answer first