For Exercises 35–49, do the following:

  1. Construct a scatterplot of the relationship between and .
  2. Interpret the scatterplot.
  3. Calculate the correlation coefficient .
  4. Interpret the value of the correlation coefficient .

Question 4.44

walkbike

44. Walking or Biking to Work. In these days of high gas prices, it is worth considering alternative methods of commuting. The table contains, for a sample of 10 American cities, the percentage of people who walk to work and the percentage of people who bike to work .

City
Anaheim 1.8 0.9
Baltimore 6.5 0.8
Buffalo 6.2 0.9
Cincinnati 5.4 0.5
Detroit 3.1 0.3
Jacksonville 1.4 0.4
Las Vegas 1.9 0.4
New Orleans 5.1 2.1
Orlando 1.9 0.4
Sacramento 3.2 2.5
Table 4.24: Source: U.S. Census Bureau.