A Schoolteacher Is Worried That the Concentration of Dangerous, Cancer-Causing

question 42

Multiple Choice

A schoolteacher is worried that the concentration of dangerous, cancer-causing radon gas in her classroom is greater than the safe level of 4pCi/L. The school samples the air for 36 days and finds an average concentration of 4.4pCi/L with a standard deviation of 1pCi/L. The value of the test statistic is ________.

• A) t₃₅ = -2.40
• B) z = -2.40
• C) t₃₅ = 2.40
• D) z = 2.40

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Definitions:

Introspection

The examination of one's own conscious thoughts and feelings, used as a method of self-reflection and in psychological studies.

Gestalt Psychology

A theory of mind and brain proposing that the operational principle of the brain is holistic, parallel, and analog, with self-organizing tendencies, or that the whole is different from the sum of its parts.

James

Refers to William James, an American philosopher and psychologist who is often referred to as the "Father of American psychology".

Ancient Greeks

The Ancient Greeks were people belonging to the Greek civilization during a period from the Dark Ages about 1200 BCE to the end of antiquity (c. 600 AD). This era was marked by significant developments in art, philosophy, science, and politics.