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Is the relationship between a newspapers being owned by a national chain and the number of local stories statistically significant at the 0.05 level after

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Is the relationship between a newspapers being owned by a national chain and the number of local stories statistically significant at the 0.05 level after we control for circulation?

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Call: 1m(formula = LocalStories ~ NationalChain + Circulation, data = newspapers) Residuals: Min 1Q Median 3Q Max -1916. 84 -584.19 -97 . 36 380. 10 2779.70 Coefficients : Estimate Std. Error t value Pr(>|t) (Intercept) 1209. 7500 102. 2361 11. 833

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