Exploring Unit 9 Section 1 Concepts

The video tutorial introduces scatter plots, explaining how they visually represent relationships between two variables. It covers positive, negative, and no associations, and demonstrates how to create scatter plots using Desmos. The tutorial explains the correlation coefficient, its range, and how it indicates the strength and direction of a linear relationship. Practical examples are provided to calculate and interpret correlation coefficients.

What type of graph is used to display the relationship between two variables?

• Scatter Plot

• Line Graph

• Bar Graph

• Pie Chart

In a scatter plot, what does it indicate if the dots are spread out with no discernible pattern?

• Strong Correlation

• No Association

• Negative Association

• Positive Association

Which tool can be used to create scatter plots easily?

• Excel

• Desmos

• Python

• Google Sheets

What is the first step in creating a scatter plot using Desmos?

• Enter X values

• Enter Y values

• Select 'Table'

• Select 'Graph'

What are the two parts used to explain the association in scatter plots?

• Mean and Median

• Range and Variance

• Slope and Intercept

• Strength and Direction

What does a correlation coefficient of 0.95 indicate?

• Weak Positive Correlation

• Moderate Positive Correlation

• No Correlation

• Strong Positive Correlation

What is the range of values for the correlation coefficient?

• -2 to 2

• -1 to 1

• 0 to 1

• -0.5 to 0.5

If the correlation coefficient is -0.97, what can be inferred about the data?

• Strong Negative Correlation

• No Correlation

• Weak Negative Correlation

• Strong Positive Correlation

What does an R value of 0 indicate?

• Perfect Negative Correlation

• Moderate Positive Correlation

• Perfect Positive Correlation

• No Correlation

Which of the following R values indicates a moderate positive correlation?

• 0.3

• 0.5

• 1.0

• 0.8