Assignment:
Construct a scatterplot, find the value of the linear correlation coefficient r, and find the critical values of r from Table A-6 using ?? =0 .05. Determine whether there is sufficient evidence to support a claim of a linear correlation between the two variables. (Save your work because the same data sets will be used in Section 10-3 exercises.)
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
|