Assume That Your Class Took an Exam Last Week and the Mean

question 8

Multiple Choice

Assume that your class took an exam last week and the mean and standard deviation of the exam were 85 and 5, respectively. Your instructor told you that 30 percent of the students had a score of 90 or above. You would probably

• A) think that your instructor was out of her mind.
• B) decide that your score of 80 would probably fall in the failing range.
• C) conclude that the scores were not normally distributed.
• D) conclude that such a set of scores could not possibly happen.

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Definitions:

Probability Distribution

It is a mathematical tool that quantifies the probability of different outcomes in any given experiment.

Exponentially Distributed

Pertaining to a continuous probability distribution used to model the time between events in a process that occur continuously and independently at a constant average rate.

Probability Distribution

An equation in mathematics that calculates the likelihood of diverse outcomes in an experimental scenario.

Exponential Distribution

A probability distribution associated with the time between events in a Poisson process, characterized by a constant mean rate.