Statistics 3.1

What type of correlation (association)?

The outside temperature and the amount of layers you wear.

• Positive correlation

• Negative correlation

• No correlation

What type of correlation?
The temperature outside and the amount of ice cream sales. 

• Positive correlation
• Negative correlation
• No correlation

Describe the correlation in the graph shown.

• Strong Negative
• Strong Positive
• Weak Negative
• Weak Positive

What kind of correlation?

• Weak Positive

• Weak Negative

• Strong Positive

• Strong Negative

Which scatter plot shows no relationship?

• Graph A
• Graph B
• Graph C
• Graph D

Is r = -0.87 strong, moderate, or weak?

• strong

• moderate

• weak

Estimate the correlation coefficient for this scatterplot.

• r = 1.2

• r = 0.89

• r = 0

• r = -0.89

Estimate the correlation coefficient.

• r=1
• r=-1
• r=0.5
• r=-0.5

Estimate the value of r:

• 0.03
• -0.99
• 0.79
• -0.72

A perfect negative correlation has a correlation coefficient of ____. 

• 1
• -1
• 0