Q19-
A researcher is testing the hypothesis that baby weight (in pounds) at 6 months after birth is related to breastfeeding (in oz). The regression equation is Weight = 6.5 + .48 * Milk/day. The Standard Error (SE) of the slope is 0.128, and the data were gathered from a sample of 188 babies (Alpha level is set at 0.05.) Which one of the following statements is INCORRECT?
The estimated weight of a baby who has 27 oz milk per day is 19.46 pounds.
Hypothesis testing for a significant slope shows evidence that Milk/day is a statistically significant slope.
Hypothesis testing evidence does not support the decision of rejecting the null hypothesis.
Based on this regression equation, milk intake per day positively predicts weight at 6 months.
t statistic = 0.48/0.128 = 3.75
This is more than 3 standard errors away from the mean value so P value corresponding to this will be very small and we reject the null hypothesis concluding that the slope is significant. Hence,
Option C is not true and therefore, it is the correct answer.
Q19- A researcher is testing the hypothesis that baby weight (in pounds) at 6 months after birth is related to breastfeeding (in oz). The regression equation is Weight = 6.5 + .48 * Milk/day. The Stan...
Hours of sitting per day significantly predicts the amount of weight gain (in 6 months). The regression equation is WeightGain = 7 + 0.49 * HoursSit. Data are from 120 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:(6.9608, 7.0392), which means the slope is statistically significant. 95%CI:(0.4508, 0.5292), which means the slope is statistically significant. 95%CI:(6.9608, 7.0392), which means the slope...