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Nicotine Sulphate is introduced into a closed room containing mosquitos to determine how efficiently the chemical kills the insects. This shows the killing efficiency—the proportion of dead mosquitos—(second column) for various doses (first column). Data supplied by Javier Osante Vazquez.

1st col	2nd col
0.10	0.170
0.15	0.264
0.20	0.436
0.30	0.615
0.50	0.826
0.70	0.926
0.95	0.962