Question 22 of 37 2 Points A researcher finds that the mean of Group 1 is 8 (X,) and the mean of Group 2 is 4 (X2). Assuming the estimated standard error of the mean for this independent samples t-test is 2, compute the observed t-value. O A. 1.00 O B. 4.00 O C. 2.00 O D. 2.83