Testing for linear correlation. Construct a scatterplot, find the value of the linear correlation r, and find the critical value using standard deviation =0.05. Determine whether there is sufficient evidence to support a claim of a linear correlation between the two variables
New Car Mileage Ratings Listed below are combined city-highway fuel economy ratings (in mi gal) for different cars. The old ratings are based on tests used before 2008 and the new ratings are based on tests that went into effect in 2008. Is there sufficient evidence to conclude that there is a linear correlation between the old ratings and the new ratings?
Old 16 27 17 33 28 24 18 22 20 29 21
New 15 24 15 29 25 22 16 20 18 26 19