15. Suppose you got data of "Hight in centimeter" and "Weight in kilogram" from all students in an
elementary school and you want to investigate the association between the height and weight. Which
of 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 compare
whether height and weight are statistically different；
(D) Develop a simple linear regression model
and detect whether the slope is significantly different from 0；
(E) Estimate the coefficient of
determination from the simple linear regression model.
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