Exhibit 9-3

question 10

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.At the 5% significance level,does the evidence support the Boston public school district's claim?

• A)No,since the p-value is less than α.
• B)Yes,since the p-value is less than α.
• C)No,since the value of the test statistic is greater than the critical value.
• D)Yes,since the value of the test statistic is greater than the critical value.

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Definitions:

Psychotherapy

Psychotherapy is a form of treatment for mental health issues which involves talking with a mental health professional to understand and change problematic thoughts, feelings, and behaviors.

HMOs

Health Maintenance Organizations, which are medical insurance groups that provide health services for a fixed annual fee, emphasizing preventive care.

DSM-IV

The fourth version of the Diagnostic and Statistical Manual of Mental Disorders serves as a manual for healthcare practitioners to assist in diagnosing mental health conditions.

Unusual Behavior

Actions or reactions of an individual or group that deviate from what is typically expected or considered normal by societal standards.