Exploring the Correlation Coefficient in Scatterplots

This video tutorial explains how to calculate the R value, or correlation coefficient, for a scatter plot using Desmos. It begins with setting up a table of x and y values, then demonstrates how to input these into Desmos to obtain the R value. The tutorial highlights that the R value is independent of the order of x and y values, emphasizing its role in showing the relationship between data sets. The video concludes with a call to action for viewers to like, subscribe, and practice the concepts learned.

What is the main topic of the video?

• How to interpret a bar graph

• How to use Desmos for graphing

• How to calculate the R value or correlation coefficient

• How to create a scatter plot

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What is required to calculate the correlation coefficient?

• A histogram

• A table of x and y values

• A bar graph

• A pie chart

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Which command is used in Desmos to calculate the correlation coefficient?

• corr()

• correlation()

• cor()

• corR()

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How do you type a subscript in Desmos?

• Just type the number after the variable

• Use the underscore symbol

• Use the caret symbol

• Use square brackets

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What is the R value given in the video?

• 0.81

• 0.61

• 0.91

• 0.71

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Does the order of x and y values affect the correlation coefficient?

• Only if y is greater than x

• Yes, it does

• No, it does not

• Only if x is greater than y

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What does the correlation coefficient indicate?

• The product of x and y values

• The sum of x and y values

• The difference between x and y values

• The strength of the relationship between x and y values

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What should you do if you like the video?

• Comment on it

• Share it

• Hit the like button

• Ignore it

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