Data Analysis and Graphs Flashcards

Question 1

What is a bar graph?

Accepted Answer

A graph that uses rectangular bars to compare values across categories; bar height (or length) represents the frequency or amount.

Question 2

What is the difference between a histogram and a bar graph?

Accepted Answer

A histogram uses numerical intervals on the horizontal axis and bars touch; a bar graph uses separate categories and bars are typically separated.

Question 3

How do you identify outliers using the IQR rule?

Accepted Answer

Compute $	ext{IQR}=Q_3-Q_1$. Any value $< Q_1 - 1.5(	ext{IQR})$ or $> Q_3 + 1.5(	ext{IQR})$ is an outlier.

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