A Professor Has Learned That Three Students in His Class

question 27

Multiple Choice

A professor has learned that three students in his class of 20 will cheat on the final exam. He decides to focus his attention on four randomly chosen students during the exam. What is the probability that he finds at least one of the students cheating?

• A) 0.4912
• B) 0.4211
• C) 0.5088
• D) 0.5789

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Definitions:

Nonparametric Method

A type of statistical method that does not assume a particular distribution for the data, often used when data doesn't fit normal distribution assumptions.

Matched Pairs

A study design in which each experimental unit (or subject) is paired with a control unit that is similar in terms of key variables except for the treatment under investigation.

Ordinal

Ordinal relates to a categorical, statistical data type which reflects ordered entities in which the order matters but the differences between the entities do not have a mathematical meaning.

Friedman Test

A non-parametric statistical test used to compare three or more matched or paired groups across multiple test conditions or times, assessing differences in rankings.