Table of Contents

## What type of graph is best for two quantitative variables?

scatterplot

A scatterplot is the most useful display technique for comparing two quantitative variables. We plot on the y-axis the variable we consider the response variable and on the x-axis we place the explanatory or predictor variable.

## What are two types of quantitative variables?

Discrete and continuous variables are two types of quantitative variables:

- Discrete variables represent counts (e.g. the number of objects in a collection).
- Continuous variables represent measurable amounts (e.g. water volume or weight).

## What is a quantitative variable?

Quantitative Variables – Variables whose values result from counting or measuring something. Examples: height, weight, time in the 100 yard dash, number of items sold to a shopper. Qualitative Variables – Variables that are not measurement variables.

## What are some examples of quantitative variables?

Examples of Quantitative Variables / Numeric Variables:

- High school Grade Point Average (e.g. 4.0, 3.2, 2.1).
- Number of pets owned (e.g. 1, 2, 4).
- Bank account balance (e.g. $100, $987, $-42.
- Number of stars in a galaxy (e.g. 100, 2301, 1 trillion) .
- Average number of lottery tickets sold (e.g. 25, 2,789, 2 million).

## Which is a measure of the relationship between two quantitative variables?

A scatterplot is a graph used to display data concerning two quantitative variables. Correlation is a measure of the direction and strength of the relationship between two quantitative variables. Simple linear regression uses one quantitative variable to predict a second quantitative variable.

## How to show the relationship between two variables?

A graphical presentation of the relationship between two quantitative variables is scatter diagram. A display used to compare the frequency, relative frequency or percent frequency of two categorical variables is a stacked bar chart. Which of the following is least useful in making comparisons or showing the relationships of two variables?

## What kind of display is used to compare two variables?

A display used to compare the frequency, relative frequency or percent frequency of two categorical variables is a stacked bar chart. Which of the following is least useful in making comparisons or showing the relationships of two variables?

## How many variables are quantitative in a flashcard?

A student asks their classmates how tall they are, the month of their birthday, and whether or not they are in a relationship. How many of these variables are quantitative? Categorical?