A graph question about two groups tests whether the data support each part of a claim. Read the conclusion and list what each group must show, then read the title, axes, and key. Compare each group across the same settings so you can tell whether its result changes. Check every number a choice gives against those comparisons. A choice can report some data correctly and still fail to show the whole claim.
Hints
- Hint 1
Look for what the analyst claims for each device type. Treat each part of the conclusion as a separate check.
- Hint 2
Compare Design A with Design B for each device type. What happens to the mobile rate, and what happens to the desktop rate?
Step-by-step
Compare each device across designs
Step 1Split the conclusion into two checks
The analyst says Design B increased the account-creation rate for mobile visitors but did not change the rate for desktop visitors. What must the graph show for each device type? Mobile must be higher with Design B, and desktop must be unchanged, each compared with Design A. A rise for mobile alone won't support both parts, so we'll make a separate comparison for desktop.
- Step 2
Read the bars for each device
The title tells us we're looking at account-creation rates for mobile and desktop visitors under each design. The horizontal axis separates the designs, and the vertical axis gives percentages. With the key, we can track the same device type from Design A to Design B. Mobile goes from 8% to 12%, while desktop is 10% under both, so only the mobile rate increases.
- Step 3
Test every comparison in the choices
Which statement reports both comparisons accurately? The claim about both mobile and desktop visitors adds a desktop rise, while decreased the rate for desktop visitors adds a desktop fall. Desktop can't be higher under both designs, since Design B has 12% for mobile and 10% for desktop. The statement pairing rose from 8% with stayed at 10% for both designs supports both parts of the analyst’s claim. Choice B.