A Large Carpet Store Wishes to Determine If the Brand

question 18

Essay

A large carpet store wishes to determine if the brand of carpet purchased is related to the purchaser's family income. As a sampling frame, the store mailed a survey to people who have a store credit card. Five hundred customers returned the survey and the results follow: At the 5% level of significance, can you conclude that the brand of carpet purchased is related to the purchaser's family income? Justify your answer.

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Definitions:

Suprachiasmatic Nucleus

A small region of the brain in the hypothalamus, responsible for controlling circadian rhythms.

Optic Chiasm

Junction of the optic nerves, one from each eye, at which the axons from the nasal halves of the retinas cross to the brain’s opposite side.

Hypothalamus

A region of the brain that regulates vital bodily functions, including temperature, hunger, thirst, fatigue, sleep, and circadian rhythms.

Sleep State

A natural, reversible state of reduced responsiveness to external stimuli and relative inactivity, accompanied by complex physiological processes essential for health.