A Researcher Wants to Determine the Proportion of Elm Trees

question 4

Short Answer

A researcher wants to determine the proportion of elm trees in Superior, Wisconsin, dying of Dutch elm disease. Past experiments based on large sample sizes have shown this proportion to be 0.3. What sample size does the researcher need in order to estimate this proportion to within 0.04 with 95% confidence?
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Definitions:

Defendant's Breach

An act of breaking or failing to observe a law, agreement, or code of conduct by the individual or entity being sued in a legal action.

Battery

A criminal offense involving the unlawful physical acting upon a threat, distinct from assault which is the act of creating apprehension of such contact.

Assault

An act that intentionally places another person in apprehension of imminent harmful or offensive contact.

Contributory Negligence

Contributory negligence is a legal principle where a plaintiff's own negligence partially contributes to the harm they have suffered, potentially reducing or barring their ability to recover damages.