The Limitation Imposed on Population Density by Environmental Factors Is

question 106

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The limitation imposed on population density by environmental factors is poorly understood.One theory is that terrestrial carnivores are particularly sensitive to the food supply.Spiders are very important species in terrestrial communities, and their survival is ecologically important.To better understand the relation between food level and spider survival, an experiment was conducted by supplementing the food supply of immature spiders in an area of low population density.In a control group of immature spiders, 83 out of 112 survived to the end of the experiment; in the food- supplemented experimental group, 76 out of 81 survived.The 90% confidence interval for the difference in population proportions is:

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Definitions:

Chi-square Test

A statistical test used to determine the association between categorical variables, assessing whether observed frequencies differ significantly from expected frequencies.

Null Hypothesis

A null hypothesis is a type of hypothesis used in statistics that proposes no significant difference or effect, serving as the default assumption until evidence suggests otherwise.

Simple Random Samples

A subset of a statistical population in which each member of the subset has an equal probability of being chosen.

T-butyl Ethyl Ether

An organic compound, specifically an ether, made from the reaction between tert-butanol and ethanol, used as a solvent or reactant.