Question

researchers used anonymized location data from the us and côte divoire to document peoples daily patterns of mobility, using these results to test the efficacy of the researchers predictive computer model. in each country, unidirectional cycles among two, three, or four locations were empirically the most common pattern types; the graph shows each of these pattern types as a proportion of all instances found for that country (e.g., the measured value for cl 3 in the graph, 0.12, indicates that the three - location pattern constituted 12% of all pattern instances in the côte divoire data). which choice most effectively uses data from the graph to illustrate the researchers conclusion? a) under the assumption that density is more salient than preferences, the us 2 and cl 2 proportions are approximately 0.65 and 0.85, respectively, significantly higher than the values predicted under the other assumption and thus farther than those predictions from the measured values. b) under the assumption that preferences are more salient than density, the two - location patterns (us 2 and cl 2) were predicted to be most frequent in the data even though neither proportion was projected to exceed 0.5, well below the proportion predicted under the other assumption. c) under the assumption that preferences are more salient than density, the us 2 and cl 2 proportions were predicted to be in the range of 0.3 to 0.5, placing them farther from the measured values than were those predicted under the other assumption. d) under the assumption that preferences are more salient than density, the us 2 and cl 2 proportions were predicted to be approximately 0.45 and 0.35, respectively, both below the measured values, whereas under the other assumption, the model overestimated the proportion for us 2 and overestimated that for cl 2.

Explanation:

• Analyze each option:
• Option A: Mentions "density is more salient than preferences" which is not relevant to the graph data about the relationship between measured and predicted values under the "preferences are more salient than density" assumption.
• Option B: Claims that two - location patterns were predicted to be most frequent. But the graph is about comparing measured and predicted values, not about which pattern is most frequent.
• Option C: States that the US 2 and CI 2 proportions were predicted to be in the range of 0.3 to 0.5. But the graph shows more specific predicted values (approximately 0.45 and 0.35 for US 2 and CI 2 respectively under the "preferences are more salient than density" assumption).
• Option D: Correctly uses the graph data. It accurately describes the predicted values (approximately 0.45 for US 2 and 0.35 for CI 2 under the "preferences are more salient than density" assumption) and compares them with the measured values (which are higher for both), and also mentions the over - estimation under the other assumption.

Answer:

D. Under the assumption that preferences are more salient than density, the US 2 and CI 2 proportions were predicted to be approximately 0.45 and 0.35, respectively, both below the measured values, whereas under the other assumption, the model overestimated the proportion for US 2 and overestimated that for CI 2.