We Are Interested in Comparing the Average Supermarket Prices of Two

question 84

Multiple Choice

We are interested in comparing the average supermarket prices of two leading colas. Our sample was taken by randomly selecting eight supermarkets and recording the price of a six-pack of each
Brand of cola at each supermarket. The data are shown in the following table: If the problem above represented a paired difference, what assumptions are needed for a
Confidence interval for the mean difference to be valid?

• A)The population variances are equal.
• B)The population of paired differences has an approximately normal distribution.
• C)The samples were independently selected from each population.
• D)All of the above are needed.

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Definitions:

General Adaptation Syndrome

A sequence of three reactions (alarm, resistance, exhaustion) proposed by Hans Selye, which the body experiences during extended periods of stress.

Alarm Reaction

Alarm reaction is the initial stage in the body's response to stress, triggering a heightened state of alert and mobilization of the body's resources.

Panic

A sudden, overwhelming feeling of fear and anxiety that can result in wildly unthinking behavior.

General Adaptation Syndrome

A three-stage response pattern that the body goes through when exposed to stress, including alarm, resistance, and exhaustion phases.