Exhibit 3-2 In 1990 the New York Times Reported the Average Number

question 12

Essay

Exhibit 3-2
In 1990 the New York Times reported the average number of square feet per standing passenger in 1987 and 1988 for 19 subway stops. Although the sampling method was not reported, we will presume that these data represent a random sample of days during the morning and evening rush hours. The NYC Transit Authority managers attempted to improve the space problem on subway cars (more space is better--trust us!) by adding cars to trains during the rush hours. They gathered the 1988 data to check on their efforts after one year. The data are in the table below.
-Refer to Exhibit 3-2.
(a)Construct a comparative stem & leaf plot of the space per standing passenger for the morning rushes of 1987 vs. the morning rushes of 1988.
(b)Using your plot in part (a), describe the differences and similarities in the distributions of the morning standing room for the two years.

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Definitions:

Behavioral Therapy

A type of psychotherapy that aims to modify harmful behaviors through conditioning and learning strategies.

Attention-Deficit/Hyperactivity Disorder

A neurodevelopmental disorder characterized by patterns of inattention and/or hyperactivity-impulsivity that interfere with functioning or development.

Behavioral Therapies

Psychotherapeutic approaches that focus on identifying the reinforcements and punishments contributing to a person’s maladaptive behaviors and on changing specific behaviors.

Pervasive Developmental Disorders

Disorders characterized by severe and persisting impairment in several areas of development.