Answer Happy

A recent study suggests that both noise pollution and air pollution can increase the risk of cardiovascular disease. Suppose a random sample of adults who have lived in the same home for at least five years was obtained. The nighttime noise level was measured in cach home in decibels) and an Agatston score for each person was found using electron beam computed tomography. The score indicates the level of coronary calcification, where a higher Agatston score suggests a greater cardiovascular risk Consider the predicted sample regression equation that predicts the Agatston score using the noise level (in decibals) Yi-hat = 39.3 +,8796 (noise in decibals) Which of the following statements is correct regarding the estimated equation?

a) a. The sample slope coefficient of suggests that an increase of 1 dB leads to an increase of approximately 9 in the Agatston score. e. both a and c are correct Ob) b. The sample slope coefficient of suggests that an increase of 1 dB leads to an increase of approximately 39.3 in the Agatston score. c) c. the estimated value of the intercept indicates the average Agatston score for zero noise decibals d) d. both a and b are correct e) e. both a and care correct