Refer to A19.5. To acquire information about who is shopping downtown, the statistics practitioner also recorded the annual household income (in $1,000s) of the respondents. Is there enough evidence to infer that affluent people shop downtown more frequently than poorer people? (The author is grateful to Patricia Gafoor-Darlington and Michael Kirby-MacLean for writing these exercises.)

In exercise A19.5

In city after city, downtown cores have become less and less populated and poorer because shoppers have taken their money to the suburbs and to shopping malls. One reason often given for the decline in downtown shops is the difficulty in parking. To shed more light on the issue, a random sample of 197 adults was asked to rate the difficulty in parking using the following responses:

Poor (1),

Acceptable (2),

Good (3),

Very good (4),

Excellent (5)

These adults were also asked how often they shopped at a downtown store in a typical month. Do these data allow us to infer that the problem of parking is one reason for the decline in downtown shopping?