Question: 12: In order to investigate the feasibility of starting a Sunday edition for a large metropolitan newspaper, information was obtained from a sample of 34 newspapers concerning their daily and Sunday circulations (in thousands) (Source: Gale Directory of Publications, 1994). The data are given in Table 2.12 and can be found in the book's Web site.

(a) Construct a scatter plot of Sunday circulation versus daily circulation. Does the plot suggest a linear relationship between Daily and Sunday circulation? Do you think this is a plausible relationship?

(b) Fit a regression line predicting Sunday circulation from Daily circulation.

(c) Obtain the 95% confidence intervals for \({{\beta }_{0}}\) and \({{\beta }_{1}}\).

(d) Is there a significant relationship between Sunday circulation and Daily circulation? Justify your answer by a statistical test. Indicate what hypothesis you are testing and your conclusion.