04 1450 Chapter 4 - Chapter 4 Scatterplots and Correlation STAT 1450 Autumn 2014 Connecting Chapter 4 to our Current Knowledge of Statistics Our

04 1450 Chapter 4 - Chapter 4 Scatterplots and Correlation...

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Chapter 4: Scatterplots and Correlation STAT 1450 – Autumn 2014
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Connecting Chapter 4 to our Current Knowledge of Statistics Our conversation to date has focused on counts or measurements of one variable. We will extend the conversation to measure a pair of quantitative variables.
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Connecting Chapter 4 to our Current Knowledge of Statistics 1. List 3 quantitative variables that might influence someone’s monthly rent amount. 2. Classify each of the 4 variables (including monthly rent) as either a cause or an effect .
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Explanatory and Response Variables A response (dependent) variable measures an outcome of a study. 4.1 Explanatory and Response Variables
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Explanatory and Response Variables A response (dependent) variable measures an outcome of a study. Effect 4.1 Explanatory and Response Variables
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Explanatory and Response Variables A response (dependent) variable measures an outcome of a study. Effect An explanatory (independent) variable explains or influences changes in a response variable. 4.1 Explanatory and Response Variables
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Explanatory and Response Variables A response (dependent) variable measures an outcome of a study. Effect An explanatory (independent) variable explains or influences changes in a response variable. Cause 4.1 Explanatory and Response Variables
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Explanatory and Response Variables A response (dependent) variable measures an outcome of a study. Effect An explanatory (independent) variable explains or influences changes in a response variable. Cause Typically, the explanatory variable is plotted on the -axis, and the response variable is plotted on the -axis. If there is no explanatory-response distinction, either variable can go on the -axis. 4.1 Explanatory and Response Variables
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Explanatory and Response Variables Sometimes we would like to show a causal relationship between the two variables (where one or more explanatory variable(s) causes a change in the response variable.) More will be discussed about this later on in Chapter 8. 4.1 Explanatory and Response Variables
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Question: Which variable in each of the following pairs is the explanatory variable and which is the response variable? There might not be a clear answer in some cases—that is, there might be some cases where we would just like to explore the relationship between the two variables. a) Explanatory: Square Footage of a Home Response: Real Estate Taxes b) Explanatory: Real Estate Taxes Response: Square Footage of a Home c) Explore the relationship Explanatory and Response Variables 4.1 Explanatory and Response Variables
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Question: Which variable in each of the following pairs is the explanatory variable and which is the response variable? There might not be a clear answer in some cases—that is, there might be some cases where we would just like to explore the relationship between the two variables.
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