Question 8·Medium·Command of Evidence
A café chain tested whether a redesigned menu board would change what customers order. For four weeks, the café used its standard menu board; then it installed a new design that placed pastries at the top and used larger photos.
The café tracked the percentage of orders that included a pastry and the percentage of orders that included coffee each week for eight weeks total.
Managers concluded that introducing the redesigned menu board increased pastry ordering but did not meaningfully change coffee ordering.
Which choice best describes data in the graph that support the managers’ conclusion?
For graph-based command-of-evidence questions, translate the conclusion into two concrete graph checks (here: pastry should rise after the redesign; coffee should stay roughly constant). Then compare the relevant time windows or groups and pick the option that accurately states both the direction and approximate size of the changes.
Hints
Use the redesign marker
Focus on the change from the weeks before the vertical line to the weeks after it.
Track each line separately
One line should show a clear upward shift after the redesign; the other should stay in roughly the same range.
Estimate ranges, not single points
Look at the approximate range of values in weeks 1–4 versus weeks 5–8 for each category.
Step-by-step Explanation
Restate the conclusion in measurable terms
To support the conclusion, the graph should show pastry orders increasing after the redesign and coffee orders staying about the same.
Compare the weeks before vs. after the redesign
The vertical marker indicates when the redesigned menu is introduced. Before it (weeks 1–4), pastry orders are around 18–20%. After it (weeks 5–8), pastry orders are in the mid-to-high 30s (about 34–37%).
Coffee orders are about 62–64% both before and after the redesign.
Select the choice that matches both patterns
The choice that describes a large increase in pastry orders from weeks 1–4 to weeks 5–8 while also showing coffee remaining about 62–64% is:
From weeks 1–4 to weeks 5–8, the percentage of orders with a pastry increases from about 18–20% to about 34–37%, while the percentage of orders with coffee stays about 62–64% in both periods.