Question 23M.2.SL.TZ1.c

Walkability is a measure of how friendly an urban area is for walking. The researchers determined a walkability score for cities in the USA, based on such measures as block length, availability of sidewalks and distances between homes and destinations such as shops, workplaces or parks. They also calculated a coefficient of activity inequality for each city from the variation among individuals in number of steps per day. A coefficient of zero would indicate that all individuals took the same number of steps. The scattergraph shows the relationship between walkability and activity inequality for the 69 cities where smartphone data was available for at least 200 individuals.

^{[Source: Material from: Althoff, T., Sosič, R., Hicks, J., et al., Large-scale physical activity data reveal
worldwide activity inequality, published 2017, Nature, reproduced with permission of SNCSC.]}