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Table 2 Descriptive statistics of the 30 technical and tactical indices of the 100 matches

From: Technical and tactical diagnosis model of table tennis matches based on BP neural network

Variables M ± SD Variables M ± SD Variables M ± SD
x1 .0645 ± .05043 x11 .1557 ± .0683 x21 .1973 ± .0607
x2 .7663 ± .4021 x12 .6379 ± .2378 x22 .4234 ± .2055
x3 .0620 ± .0458 x13 .2005 ± .0662 x23 .1975 ± .0611
x4 .8001 ± .3613 x14 .5617 ± .2431 x24 .3792 ± .1969
x5 .0567 ± .0400 x15 .2038 ± .0620 x25 .3917 ± .1060
x6 .8093 ± .3575 x16 .5376 ± .1879 x26 .4038 ± .1669
x7 .1577 ± .0661 x17 .2234 ± .0662 x27 .3861 ± .0957
x8 .6065 ± .2771 x18 .5527 ± .1813 x28 .3988 ± .1497
x9 .1507 ± .0583 x19 .1857 ± .0576 x29 .3667 ± .1079
x10 .6494 ± .2339 x20 .3912 ± .2355 x30 .3917 ± 1426