In Order for a C++ Program to Read Data from a File

question 21

Multiple Choice

In order for a C++ program to read data from a file,

• A) the file must already exist.
• B) the program must define a file stream object that can "point to" (i.e., reference) the file.
• C) the program must open the file.
• D) All of the above are required.

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Definitions:

Expected Frequencies

The theoretically predicted count of occurrences in each category of a contingency table under the assumption that the null hypothesis is true.

Chi-Square Distribution

A probability distribution that is used to test hypotheses about the variance of a population and the distribution of categorical variables.

Categories

Distinctive groups or classes into which items, individuals, or concepts are divided based on shared characteristics or attributes.

Multinomial Experiment

An experiment that leads to outcomes categorized into more than two independent and mutually exclusive categories.