Tiffany Dolsing, a market analyst at the market research firm of Sanders & Sons, is analyzing household budget data collected by her firm. Tiffany's dependent variable is monthly household expenditures on groceries (in $'s), and her independent variable is annual household income (in $1,000's). Regression analysis of the data yielded the following tables. Coefficients Standard Error t Statistic p-value Intercept 39.14942 22.30182 1.755436 0.109712 X -1.792312 0.407507 4.398234 0.001339 Source df SS MS s.e. = 29.51443 F Regression 1 16850.99 16850.99 19.34446 72 = 0.682478 Residual 9 7839.915 871.1017 Total 10 24690.91 The correlation coefficient between the two variables in this regression is O 0.682478 O -0.83 O 0.83 O -0.68 O 1.0008