D Question 15 1 pts Hours of sitting per day significantly predicts the amount of weight gain (in 6 months). The regression equation is WeightGain 6+0.45 Hours Sit. Data are from 651 full-time employees in a public urban university. With a standard error for the slope (SE_b1) of 0.02, what is the 95% confidence interval of the slope. 95% CI:(5.9608, 6.0392), which means the slope isn't statistically significant.. 95% CI:(5.9608, 6.0392), which means the slope is statistically significant. 95% CI:(0.4108, 0.4892), which means the slope is statistically significant. 95%CI: (0.4108, 0.4892), which means the slope isn't statistically significant.