A Researcher Wishes to Estimate the Mean Amount of Money

question 25

Short Answer

A researcher wishes to estimate the mean amount of money spent per month on food by households in a certain neighborhood. She desires a margin of error of $30. Past studies suggest that a population standard deviation of $248 is reasonable. Estimate the minimum sample size needed to estimate the population mean with the stated accuracy.

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Definitions:

Iso-

A prefix indicating equality, uniformity, or similarity in certain scientific and technical contexts.

Dia-

A prefix meaning through, across, or apart, used in various medical and scientific terms.

-pnea

A suffix used in medical terms to denote a condition related to breathing, such as apnea (absence of breathing) or dyspnea (difficulty breathing).

Prefix

A group of letters placed at the beginning of a word to alter its meaning or create a new word, such as “un-” in “unhappy”.