B. 22 . What is the mean? A. 21.4 B. 22.4 C. 23.4 . Which is not a measure of variability? A.Range B.Variance C. Mode In 20. 15. 8, 6,7, 5, the Range is A.15 B.8 C. 20 A measure of variability which is obtained by extracting the so A.Range B.Standard Deviation C. Range In 2, 3, 6, 8, 11, the variance is 10.8, what is the standard de A 3.33 B.3.19 C. 3.29 A measure of how spread out a group of scores is A. Central tendency B. statistics 工 C. variabi .The simplest measure of variability is A.Variance B.Standard Deviation C. Rarge If the scores are very scattered, the data is A heterogenous B. homogenous C. unique