Compute the Probability of an Event Using the Complement Rule $X$

question 229

Multiple Choice

Compute the Probability of an Event Using the Complement Rule
-A sample of 280 shoppers at a large suburban mall were asked two questions: (1) Did you see a television ad for the sale at department store X during the past 2 weeks? (2) Did you shop at department store X during the past 2 weeks? The responses to the questions are summarized in the table. What is the probability that a randomly selected shopper from the 280 questioned did not shop at department store $X$ ?
$\begin{array}{l|c|c} & \text { Shopped at X } & \text { Did Not Shop at X } \\\hline \text { Saw ad } & 140 & 30 \\\hline \text { Did not see ad } & 30 & 80\end{array}$

• A) \(0.393\)
• B) \(0.107\)
• C) \(0.286\)
• D) \(0.607\)

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Definitions:

Aggregate Demand

The total demand for all goods and services in an economy at various price levels, during a specific time period.

Full Employment

An economic situation where all available labor resources are being used in the most efficient way possible, essentially meaning there is no involuntary unemployment.

Keynes

Refers to John Maynard Keynes, an influential British economist whose ideas fundamentally changed the theory and practice of macroeconomics and the economic policies of governments.

Government Spending

Expenditures by the government for goods and services that directly benefit the population, including spending on health, education, defense, and public infrastructure.