Tests for Statistical Significance Must Be Performed

Multiple Choice

Tests for statistical significance must be performed

A) because the TRUE values of the intercept and slope parameters are random variables.
B) because the ESTIMATED values of the intercept and slope parameters are not,in general,equal to the true values of the intercept and slope parameters.
C) because the computed t-ratios are random variables and may be too large to provide evidence that b is not equal to zero.
D) in order to determine whether or not the parameter estimates are far enough away from zero to conclude that the true parameter values are not equal to zero.
E) both b and d