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Ecotoxicological survival study. The Journal of Agricultural, Biological and Environmental...

Ecotoxicological survival study. The Journal of Agricultural, Biological and Environmental Statistics(Sept. 2000) gave an evaluation of the risk posed by hazardous pollutants. In the experiment, guppies (all the same age and size) were released into a tank of natural seawater polluted with the pesticide dieldrin and the number of guppies surviving after five days was determined. The researchers estimated that the probability of any single guppy surviving is .60. If 300 guppies are released into the polluted tank, estimate the probability that fewer than 100 guppies survive after five days.

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