DS Midterm Exam

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What are the two types of statistics?

1) Descriptive

2) Inferential
What is Descriptive Statistics?

Collecting, summarizing, and describing data.
What is Inferential statistics?

Drawing conclusions and/or making decisions concerning a population based only on sample data.
What is a Variable?

A characteristic of an item or individual.
What are the two types of variables?

1) Categorical (qualitative)

2) Numerical (quantitative)
What is a Categorical variable?

A variable that has value that can only be placed into categories, such as "yes" and "no".
What is a Numerical variable?

A variable that has values that represent quantities.