样本数

平均值

标准差

方差

lllll

44

475.2975

45.29359

2051.509

llrll

44

544.7841

49.19582

2420.229

rrlrr

44

553.9270

49.95618

2495.620

rrrrr

44

459.8559

37.81362

1429.869