Skip to main content

Table 1 Statistics for negative control data obtained in this study

From: Negative and positive control ranges in the bacterial reverse mutation test: JEMS/BMS collaborative study

Statistics TA100 TA98 TA1535 TA1537 WP2uvrA
-S9 +S9 -S9 +S9 -S9 +S9 -S9 +S9 -S9 +S9
No. of data 26 26 26 26 25 25 25 25 23 23
Mean 102 115 21 28 10 10 9 13 24 28
SD 17.34 20.06 8.23 6.66 3.10 3.17 2.95 4.60 4.87 7.33
Variance 312.57 418.66 70.36 46.06 10.01 10.48 9.08 22.01 24.75 56.23
Min 69 78 12 17 6 5 3 6 14 17
Max 132 156 40 42 19 18 15 23 33 47
Kurtosis − 0.63 − 0.64 0.58 −0.73 0.88 0.64 − 0.63 − 0.24 0.04 0.29
Skewness −0.09 0.30 1.22 0.40 0.98 0.80 0.15 0.54 −0.25 0.82
2SD- 68 74 5 15 4 4 3 4 14 13
2SD+ 137 156 37 42 17 17 15 23 33 43
3SD- 50 54 −4 8 1 1 0 0 9 6
3SD+ 154 175 46 48 20 20 17 27 38 50
  1. Min minimum count, max maximum count, 2SD− mean − 2× standard deviation, 2SD+ mean + 2× standard deviation, 3SD− mean − 3× standard deviation, 3SD+ mean + 3× standard deviation