Testing for a Linear Correlation. In Exercises 13–28, construct a scatterplot, and find the value of the linear correlation coefficient r. Also find the P-value or the critical values of r from Table...

Testing for a Linear Correlation. In Exercises 13–28, construct a scatterplot, and find the value of the linear correlation coefficient r. Also find the P-value or the critical values of r from Table A-6. Use a significance level of α = 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 10-2 exercises.)

Pizza and the Subway  The “pizza connection” is the principle that the price of a slice of pizza in New York City is always about the same as the subway fare. Use the data listed below to determine whether there is a significant linear correlation between the cost of a slice of pizza and the subway fare.

Extracted text: Year 1960 1986 1973 1995 2003 2.00 2002 2009 2013 2015 0.15 1.25 1.00 1.75 2.25 2.75 Pizza Cost 0.35 2.30 Subway Fare 1.00 1.35 1.50 2.00 2.25 2.75 0.15 30.2 0.35 48.3 2,50 233.0 CPI 112.3 162.2 191.9 197.8 237.2 214.5