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. Author manuscript; available in PMC: 2018 Nov 28.
Published in final edited form as: Stat Methods Med Res. 2016 Oct 20;27(7):2038–2049. doi: 10.1177/0962280216673675

Table 1.

Observed price and consumption data in rats during progressive unit dose reduction in the nicotine self-administration case study.

Price 50 100 150 300 429 750 1500 3000 6000 12000
Males Nicotine consumption
1 2.022 1.611 1.246 0.8 0.4571 0.1692 0.032
2 1.482 1.08 0.82 0.613 0.1589 0.0588 0.0106
3 1.44 0.981 0.814 0.46 0.1449 0.052 0.014
4 2.22 1.461 1.04 0.643 0.4179 0.22 0.0346 0.0117
5 1.38 1.011 0.9 0.587 0.4809 0.22 0.088 0.029 0.00565 0.002175
6 1.68 1.32 1.046 0.6 0.476 0.2492 0.0834
7 1.656 0.771 0.72 0.46 0.2751 0.096 0.018
Females
1 3 1.44 1.026 0.683 0.168 0.0652
2 2.22 0.969 0.9 0.263 0.147 0.032
3 1.62 0.831 0.734 0.287 0.0959 0.0428 0.0094
4 3.36 1.899 1.126 0.683 0.567 0.3348 0.0586
5 1.998 1.17 1 0.55 0.4571 0.2188 0.0606 0.0193 0.0108
6 1.842 1.221 1.094 0.72 0.5159 0.2732 0.1314 0.0227 0.00885
7 2.322 1.35 0.926 0.67 0.4501 0.232 0.04 0.0157