=+30. Tracking hurricanes 2012. Like many businesses, The National Hurricane Center also participates in a program to improve the quality of data and predictions by government agencies. They report their errors in predicting the path of hurricanes. The following scatterplot shows the trend in 48-hour tracking errors since 1970. (www.nhc.noaa.gov/

verification/pdfs/1970-present_OFCL_ATL_annual_trk_ errors_noTDs.pdf)

200 100 Error (nautical miles) 300 0 10 20 30 40 Years since 1970 Dependent variable is: Error R-squared = 75.4% s = 39.10 Variable Coeff Intercept 294.138 Years-1970 -5.392