The Tread Life of Tires Mounted on Light-Duty Trucks Follows

question 24

Multiple Choice

The tread life of tires mounted on light-duty trucks follows the normal probability distribution with a population mean of 60,000 miles and a population standard deviation of 4,000 miles. Suppose we select a sample of 40 tires and use a simulator to determine the tread life. What is the likelihood of finding that the sample mean is between 59,050 and 60,950?

• A)0.4332
• B)0.8664
• C)1.00
• D)Very likely

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Definitions:

Self-serving Bias

In attribution, the tendency for people to take personal credit for acts that yield positive outcomes and to deflect blame for bad outcomes by attributing them to external causes.

Fundamental Attribution Error

The tendency to overemphasize personality-based explanations for behaviors observed in others while underestimating the influence of situational factors.

Actor-observer Difference

The tendency to attribute one's own actions to situational factors while attributing others' actions to their personal characteristics.

Self-fulfilling Prophecy

A belief or expectation that influences actions in a way that causes the belief to become true.