A Survey of an Introductory Statistics Class in Autumn 2003

question 89

Essay

A survey of an introductory statistics class in Autumn 2003 asked students whether or not
they ate breakfast the morning of the survey. Results are as follows:
a. What is the probability that a randomly selected student is female?
b. What is the probability that a randomly selected student ate breakfast?
c. What is the probability that a randomly selected student is a female who ate breakfast?
d. What is the probability that a randomly selected student is female, given that the student
ate breakfast?
e. What is the probability that a randomly selected student ate breakfast, given that the
student is female?
f. Does it appear that whether or not a student ate breakfast is independent of the student's
sex? Explain.

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Definitions:

AFL-CIO

The American Federation of Labor and Congress of Industrial Organizations, a national trade union center in the United States.

California Labor Relations Act

Legislation aimed at regulating the relationship between workers and employers in California, often focusing on collective bargaining rights.

Boycott

A collective and intentional act of abstaining from using, buying, or dealing with an organization as an expression of protest.

Confounding Variable

A variable that influences both the dependent and independent variables, causing a spurious association.