回答:
#211/2或105.5#
说明:
找到意思是:
#-3 + -6 + 7 + 0 + 3 + 2 = 3#
#3/6 = 1/2#
从数据中的每个数字中减去均值并将结果平方:
#-3 - 1/2 = -7/2#
#-6 - 1/2 = -13/2#
#7 - 1/2 = 13/2#
#0 - 1/2 = -1/2#
#3 - 1/2 = 5/2#
#2 - 1/2 = 3/2#
#(-7/2)^2 = 49/4#
#(-13/2)^2 = 169/4#
#(13/2)^2 = 169/4#
#(-1/2)^2 = 1/4#
#(5/2)^2 = 25/4#
#(3/2)^2 = 9/4#
找到平方差异的平均值:
#49/4 + 169/4 + 169/4 + 1/4 + 25/4 + 9/4 = 422/4 = 211/2或105.5#