systolic blood pressures from 2 random samples of the same population have the SAME VARIANCE. sample 1 has 200 observations and sample 2 has 800 observations. which one(s) of the following is/are true? (can pick more than one)

a) the some of the deviations from the mean in both samples is 0

b) the sums of squared deviations for sample 2 is larger than in sample 1

c) standard deviation of sample 1 is larger than standard deviation of sample 2

d) roughly speaking, the average distance of the observations from the mean in sample 1 is smaller than the same measure for sample 2