15. Suppose you got data of "Hight in centimeter" and "Weight in kilogram" from all students in anelementary school and you want to investigate the association between the height and weight. Whichof the following is/are NOT appropriate?
(A) Conduct a line chart to visualize their association；
(B)Estimate a correlation coefficient, which ranges from -1 to +1；
(C) Conduct a t-test to comparewhether height and weight are statistically different；
(D) Develop a simple linear regression modeland detect whether the slope is significantly different from 0；
(E) Estimate the coefficient ofdetermination from the simple linear regression model.