Exhibit 10

question 34

Multiple Choice

Exhibit 10.10.A bank is trying to determine which model of safe to install.The bank manager believes that each model is equally resistant to safe crackers,but sets up a test to be sure.He hires nine safe experts to break into each of the models,timing each endeavor.The results (in seconds) are given next,paired by expert.Let D be the difference: Time to break Safe 1 minus Time to break Safe 2. Refer to Exhibit 10.10.Should we conclude that the average time it takes experts to crack the safes does not differ by model at the 5% significance level?

• A)Yes,the 95% confidence interval for μ_D contains 0.
• B)No,the 95% confidence interval for μ_D does not contain 0.
• C)No,the 95% confidence interval for μ_D contains 0,but the absolute value of the upper bound is larger than the absolute value of the lower bound.
• D)Not enough information to determine.

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Definitions:

Overweight

A condition characterized by having more body weight than is considered normal or healthy for one's age, height, and body type.

Internal Cues

Signals or triggers originating within an individual, such as thoughts, feelings, or sensations, that can influence behavior and decisions.

Anxious

Feeling of worry, nervousness, or unease, typically about an imminent event or something with an uncertain outcome.

Independent

Capable of thinking or acting for oneself, not influenced or controlled by others.