Is political ideology associated with income? When GSS data for 1478 cases in 2014 were used to regress y =

political views (POLVIEWS, using scores 1–7 with 1 = extremely liberal and 7 = extremely conservative) on x =

respondent’s income (RINCOME, using scores 1–12 for the 12 income categories), we get the results shown in Table 9.14.

(a) Construct a confidence interval to make an inference about the size of the slope effect of x on y. In practical terms, would you characterize this effect as major, or minor?

Why?

(b) SPSS and Stata report the correlation under the misleading heading of “Beta.” How would you interpret this value?

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TABLE 9.14 Political Views Regressed on Income R Square 0.0032 B Std. Error Beta t Sig. Constant 3.6950 0.1395 26.48 0.000 RINCOME 0.0282 0.0129 0.0569 2.19 0.029