Strength of Correlations

r = -0.3 is considered to have...

• moderate negative correlation

• weak negative correlation

• no correlation

• strong negative correlation

Which of the following best describes this correlation?

• Positive, Strong

• Negative Strong

• Positive Weak

• Negative Weak

Approximate the correlation of the scatter plot.

• r = 0

• r = 0.4

• r = -0.4

• r = 0.7

Which of the following variables is used to represent the correlation?

• C

• n

• S_x

• r

What is the direction of the scatter plot?

• Positive Association

• Negative Association

• None

• Linear

r = 0.47. What is the strength of the correlation?

• Strong

• Weak

• Moderate

• None

r = 0.599. What is the strength of the correlation?

• Strong

• Weak

• Moderate

• None

Correlation coefficient is the statistic that measures the strength and direction of a linear association between two quantitative variables.

• True

• False

If r is positive, then there is...

• Negative association

• No correlation

• Positive association

If r=0 , then there is...

• Negative association

• No correlation

• Positive association