Stamping and Embossing

Set Four

(A) The sets are different, the sample means are the same variances of the sample are the same. (B) The sets are different, the sample means are different, the variances of the sample are the same. (C) The sets are different, the sample means are the same variances of the sample are different.

a) {2,3,5,8} {1,4,6,7} average = 4.5, SD = 7 b) {2,3,5,8} {3,4,6,9} means 4.5 and 5.5, var = 7, which adds a constant does not change the variance. c) {3,4,5,6} {1,2,7,8) mean = 4.5, 1.67 and 12.33 var dissemination of data from the average increases the variance.