分析鐵礦中鐵的百分含量,得如下數(shù)據(jù):
37.45,37.20,37.50,37.30,37.25。計(jì)算該組數(shù)據(jù)的平均偏差和標(biāo)準(zhǔn)偏差()(67的平方根為25.88,5的平方根為2.236)。
A.0.14%和0.13%
B.0.14%和0.12%
C.0.11%和0.12%
D.0.11%和0.13%
A.0.01000
B.0.06000
C.0.30000
D.0.36000
A.86%
B.86.4%
C.86.42%
D.86.420%