The Scatterplot Below Shows the Hat Size and IQ of Some

question 8

Multiple Choice

The scatterplot below shows the hat size and IQ of some adults. Is the trend positive, negative, or near zero?

• A) Negative
• B) Positive
• C) Near Zero

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Definitions:

Chi-square Test of Independence

The Chi-square Test of Independence is a statistical test used to determine if there is a significant relationship between two categorical variables.

Degrees of Freedom

The number of independent values or quantities which can be assigned to a statistical distribution or to a system without violating any constraint.

Contingency Table

A tabular method to represent and analyze the relationship between two or more categorical variables, showing the distribution of one variable across levels of the other variable(s).

Chi-square Test of Independence

A statistical analysis aimed at identifying a meaningful relationship between two variables that can be categorized.