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Suppose that n = 326 1j.d. observations for (Y. X ] yield the following regression results: "= 30.53 + 69.64X, SER = 15.83, R2 = 0.71 (15.7) (12.9) Another researcher is interested in the same regression, but he makes an error when he enters the data into the regression: He enters each observation twice, so he has 652 observations (with observation 1 entered twice, observation 2 entered twice, and so forth). Which of the following estimated parameters change as result? (Check all that apply) A. The standard error of the regression (SER). B. The estimated intercept and slope C. The R of the regression. D. The standard errors of the estimated coefficients. Using the 652 observations, what results will be produced by his regression program? = 30.53 + 69.64X. SER = . R -0:71 (Round your responses to two decimal places)