Correlation Intro Part 2

Correlation Intro Part 2

by Zanier Fuller

​Correlation

Correlation is described by direction (positive, negative, None) and by its strength (strong or weak).

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​Earlier, we explored the direction when talking about correlation; now, let's look at its strength.

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​When creating a linear model, the perfect correlation creates a straight line.

​That means the closer the points are, the stronger the correlation.

​Let's look at a strong VS weak correlation.

• ​Perfect correlation: creates a straight line

• ​Strong correlation: points are closer together.

• ​Weak correlation: points are more spread out.

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READY TO TRY????

Multiple Choice

Describe the strength of the correlation

• Weak

• Strong

• Neither

• What?

Multiple Choice

• strong

• weak

• Neither

Multiple Choice

• strong

• weak

• Neither

Multiple Choice

• strong

• weak

• Neither

Multiple Choice

• strong

• weak

• Neither

Multiple Choice

• Positive, strong
• Positive, weak
• Negative, strong
• Negative, weak

Multiple Choice

Rank these scatter plots according to the intensity of the correlation represented, from weakest to strongest.

• 1, 2, 3, 4
• 2, 4, 3, 1
• 4, 3, 2, 1
• 1, 3, 4, 2

​Correlation.

​When we describe correlation, we must always describe its direction (positive, negative, none) and its strength (strong or weak).

​

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​CAN YOU DO BOTH?

Multiple Choice

• Positive, strong
• Positive, weak
• Zero
• Negative, strong

Multiple Choice

• Positive, strong
• Positive, weak
• Negative, strong
• Negative, weak

Multiple Choice

• Positive, strong
• Positive, weak
• Negative, strong
• Negative weak

Multiple Choice

• Positive, strong
• Positive, weak
• Negative, strong
• Negative, weak

Multiple Choice

• Positive, strong
• Positive, weak
• Negative, strong
• Negative, weak

Multiple Choice

• Positive, strong
• Positive, weak
• Negative, strong
• Negative, weak

Multiple Choice

Number of pets a person has and number of books a person has read

• Positive Correlation

• Negative Correlation

• No Correlation

Multiple Choice

Amount of Education and Amount of income

• Positive Correlation

• Negative Correlation

• No Correlation

Multiple Choice

Number of days absent from school vs. math average

• Positive Correlation

• Negative Correlation

• No Correlation

Multiple Choice

Test scores vs. shoe sizes

• Positive Correlation

• Negative Correlation

• No Correlation

Multiple Choice

Distance traveled vs. amount of gas in the car

• Positive Correlation

• Negative Correlation

• No Correlation

Multiple Choice

Hours of studying vs. grades

• Positive Correlation

• Negative Correlation

• No Correlation

Multiple Choice

How tall a person is and how fast they drive

• Positive Correlation

• Negative Correlation

• No Correlation

Multiple Choice

The amount of time since a movie was released and the amount of tickets sold

• Positive Correlation

• Negative Correlation

• No Correlation

Multiple Choice

What type of correlation?

• Positive Correlation

• Negative Correlation

• No Correlation

Multiple Choice

What type of Correlation?

• Positive Correlation

• Negative Correlation

• No Correlation

Multiple Choice

What type of Correlation?

• Positive Correlation

• Negative Correlation

• No Correlation

Multiple Choice

What type of correlation does the graph show?

• Positive Correlation

• Negative Correlation

• No Correlation

Multiple Choice

Which graph depicts the strongest positive correlation?

Multiple Choice

What type of correlation does the graph show?

• Positive Correlation

• Negative Correlation

• No Correlation

Multiple Choice

What type of correlation does this graph show?

• A) Positive

• B) negative

• C) none

• D) all of the above

Multiple Choice

What type of association does this graph have?

• positive 
• negative
• none
• all of the above