The Chancellor of a Major University Was Concerned About Alcohol

question 220

Multiple Choice

The chancellor of a major university was concerned about alcohol abuse on her campus and wanted to find out the proportion of students at her university who visited campus bars on the weekend before the final exam week. Her assistant took a random sample of 250 students. The portion of students in the sample who visited campus bars on the weekend before the final exam week is an example of ________.

• A) a categorical random variable
• B) a discrete random variable
• C) a continuous random variable
• D) a parameter

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Definitions:

Row Variable

In the context of a data table or matrix, it refers to the variable represented by the rows, often used in cross-tabulation to compare against another variable.

Column Variable

A variable represented by a column in a dataset, where each entry in the column represents a value of the variable.

Degrees of Freedom

In statistics, it refers to the number of independent values or quantities which can be assigned to a statistical distribution, less the number of parameters estimated.

Chi-Square

A statistical test used to assess the differences between categorically grouped data by comparing the observed frequencies of groups with expected frequencies derived from a hypothesis.