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Table 2 Frequency distribution of silver nanoparticles size (nm)

From: Comparative bioassay of silver nanoparticles and malathion on infestation of red flour beetle, Tribolium castaneum

Silver nanoparticles size (nm)

Tally marks

Frequency

Relative frequency

Percent relative frequency (%)

28.41

111

3

3/12 = 0.25

0.25 × 100 = 25

16.20

111

3

3/12 = 0.25

0.25 × 100 = 25

20.24

11

2

2/12 = 0.17

0.17 × 100 = 17

32.40

11

2

2/12 = 0.17

0.17 × 100 = 17

42.44

11

2

2/12 = 0.17

0.17 × 100 = 17

Total

12

12

12/12 − 1.0

1.00 × 100 = 100