a) Using the 0C Curve for a = 0.05, approximately how many samples are requirec to detect a mean shift of 2 standard deviations, i.e., 8 = 26 (in the gure below) With a Type 11 error of 20%? b) Approximately how many samples are required to detect a mean shift of l standarr deviation, i.e., 8 = 15 (in the gure below), With the same Type 11 error? 00 curve with a=0.05 (P126, Fig. 4.7) The larger the mean shift, the smaller the type II error - The larger the sample size, the smaller the type II error 1.0 u creased