Question 6.100

1. Choose two variables that you think have a roughly straight-line relationship. Gather data on these variables and do a statistical analysis: Make a scatterplot, find the correlation, find the regression line (use a graphing calculator or software), and draw the line on your plot. Then write a short report on your work. Some examples of suitable pairs of variables are as follows:

  1. The height and arm span of a group of people
  2. The height and walking stride length of a group of people
  3. The price per ounce and bottle size in ounces for several brands of shampoo and several bottle sizes for each brand
  4. The weight and fuel efficiency of motor vehicles [Google “vehicle weight” for lists of weights of specific vehicles, then look up the fuel efficiency (pick among city, highway, or combined mpg) of the particular vehicles.]