Effective Communication of Data Insights PCAD-31 Practice Questions (Page 3)

Questions 11–15

1. 11expert · hard

   A data analyst is presenting a recommendation to increase the marketing budget for social media ads. The analyst's evidence is a chart showing that social media ad spend has a strong positive correlation with website traffic. However, the CFO points out that the chart does not prove that the ads caused the traffic increase. What should the analyst do to strengthen the evidence-based reasoning?

   • AArgue that the strong correlation is sufficient evidence for the recommendation.
   • BAdd more data points to the existing chart to make the correlation look stronger.
   • CAcknowledge the limitation and present additional analysis, such as a comparison of traffic during ad campaigns vs. non-campaign periods.
   • DRemove the chart and present only the final budget recommendation to avoid further scrutiny.
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2. 12application · medium

   A data analyst at a regional bank must present quarterly transaction-volume trends to two different groups on the same day: the bank's board of directors and the branch-level customer service managers. The board needs a high-level view of overall growth and profitability implications, while the branch managers need to understand peak hours and staffing implications. The analyst has limited preparation time and must reuse the same core dataset. What is the most effective approach?

   • ABuild two separate slide decks from the same dataset: a summary dashboard with trend lines for the board, and a detailed bar chart of hourly volumes for the branch managers.
   • BCreate one detailed presentation with all metrics and deliver it to both groups, since the data is identical.
   • CPresent the raw data tables to both groups so they can draw their own conclusions without bias.
   • DPresent only the overall growth percentage to both groups, as it is the single most important metric.
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4. 13foundation · easy

   In a slide presentation, an analyst places a bar chart showing sales by region and then adds a text box below it. What is the most effective use of the text box?

   • ATo list all the data sources used to create the chart
   • BTo explain the key takeaway, such as which region outperformed and a possible reason why
   • CTo repeat the exact numbers displayed on the chart
   • DTo describe the chart's axes and legend in full detail
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5. 14foundation · easy

   An analyst wants to show the change in monthly revenue over a two-year period. Which visualization type is most appropriate for this message?

   • AScatter plot
   • BLine chart
   • CHistogram
   • DPie chart
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6. 15application · medium

   A data analyst is preparing a quarterly business review slide for a non-technical executive audience. The slide contains a complex line chart showing revenue across four product lines. The analyst wants to ensure the audience immediately understands the most important takeaway. What is the best way to integrate the visual with text?

   • AInclude a detailed table of all quarterly revenue figures next to the chart for reference.
   • BProvide a link to the raw dataset so executives can explore the numbers themselves.
   • CAdd a text box below the chart that states the key finding, such as 'Product B drove 60% of revenue growth this quarter.'
   • DPlace the chart on the slide with a title that describes the data source and time period.
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