In an Experiment in Which Students Took Part in a Discussion

question 14

Multiple Choice

In an experiment in which students took part in a discussion over an intercom, one "student" pretended to have an epileptic seizure.Regarding the degree of bystander intervention shown in this experiment,

• A)subjects who thought they were alone with the "victim" reported it immediately or tried to help.
• B)some subjects in the three-person groups failed to respond, and those who did were slower.
• C)more than one-third of the subjects in the six-person groups took no action at all.
• D)all of these occurred.

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Definitions:

Statistic

A numerical measurement describing some characteristic of a sample, used to infer properties of the population from which it was drawn.

Parameter

A quantity that defines certain characteristics of a system or function, often used in mathematical or statistical models.

Poisson Distribution

A probability distribution that expresses the probability of a given number of events occurring in a fixed interval of time or space when these events occur with a known constant mean rate and independently of the time since the last event.

Discrete Probability Distribution

A mathematical function that provides the probabilities of occurrence of different possible outcomes for a discrete random variable.