Exhibit 9-3

question 67

Multiple Choice

Exhibit 9-3.The Boston public school district has had difficulty maintaining on-time bus service for its students ("A Year Later,School Buses Still Late," Boston Globe,October 5,2011) .Suppose the district develops a new bus schedule to help combat chronic lateness on a particularly woeful route.Historically,the bus service on the route has been,on average,12 minutes late.After the schedule adjustment,the first 36 runs were an average of 8 minutes late.As a result,the Boston public school district claimed that the schedule adjustment was an improvement-students were not as late.Assume a population standard deviation for bus arrival time of 12 minutes. Refer to Exhibit 9-3.Develop the null and alternative hypotheses to determine whether the schedule adjustment reduced the average lateness time of 12 minutes.

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Definitions:

Duties

Obligations that individuals or entities are required to perform, often under the law or by contract.

Honesty

A moral character trait that entails being truthful, trustworthy, and sincere in one's thoughts, speech, and actions.

Fiduciary Duty

A legal obligation of one party to act in the best interest of another. The obligated party is typically someone entrusted with the care of money or property, like a trustee or legal guardian.

Legal Obligation

A duty enforced by law, requiring an individual or organization to follow or avoid a particular course of action.