Data Were Collected on Monthly Sales Revenues (In $\$ 1,000 \mathrm {~s}$

question 12

Multiple Choice

Data were collected on monthly sales revenues (in $\$ 1,000 \mathrm {~s}$ ) and monthly advertising expenditures $( \$ 100$ s) for a sample of drug stores. The regression line relating revenues (Y) to advertising expenditure $( \mathrm { X } )$ is estimated to be $\hat { y } = - 48.3 + 9.00 x$ . The predicted sales revenue for a month in which $\$ 1,000$ was spent on advertising is

• A) \(\$ 50,000\).
• B) \(\$ 851.70\).
• C) \(\$ 8,951.70\).
• D) \(\$ 41,700\).
• E) \(\$ 90,000\).

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Definitions:

Tachycardia

A condition characterized by an abnormally fast heart rate, typically considered to be over 100 beats per minute in adults.

Fibrillation

An irregular, often rapid heart rate that commonly causes poor blood flow to the body.

Arrhythmia

An irregularity in the heartbeat rhythm, which can range from minor to serious health concerns.

Fibrillation

An uncoordinated twitching of the muscle fibers, particularly noted in the heart muscle.