Suppose That We Have a Qualitative Variable Month with Categories

question 71

Multiple Choice

Suppose that we have a qualitative variable Month with categories: January, February, etc. How many dummy variables are needed to describe Month?

• A) 12
• B) 11
• C) 10
• D) 9

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Definitions:

Isalpha()

A function in programming languages like C that checks if the given character is an alphabetic letter.

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A file containing declarations of functions, macros, and data types which can be included in C or C++ programs using the #include directive.

Atoi()

A function in C programming that converts a string argument to an integer type.

Header File

A file containing C or C++ declarations and macro definitions to be shared between several source files.