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:

Product Repositioning

Changing the place a product occupies in a consumer’s mind relative to competitive products.

Competitive Products

Goods or services that are in direct competition with one another in the marketplace, targeting the same customer base.

Perceptual Mapping

A visual representation used in marketing to show how consumers perceive a brand or product in relation to competitors.

Market-product Grid

A matrix used to analyze and display the potential of various products across different market segments.