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.)
CPI and Pizza The paired values of the Consumer Price Index (CPI) and the cost of a slice of pizza from Table in the Chapter Problem are listed below. Is there a linear correlation between the CPI and the cost of a slice of pizza?
|
CPI
|
30.2
|
48.3
|
112.3
|
162.2
|
191.9
|
197.8
|
|
Subway fare
|
0.15
|
0.35
|
1
|
1.25
|
1.75
|
2
|