Correlations

r____________ Describe______________ Insert your image of the graph

Describe the correlation.

• Negative correlation

• No correlation

• Positive correlation

• Constant correlation

Which of the following contains the strongest correlation?

• r = -.61

• r = .88

• r = -.91

• r = .34

What do we call our x-axis in dealing with correlations?

• Predictor

• Criterion

• Factor

• Level

Answer explanation

The predictor variable is similar to an independent variable. You think it's the best explanation of your outcome.

Which of the following best describes the correlation depicted to the left?

• The graph has a weak relationship.

• The graph contains no correlation.

• The graph has a positive correlation.

• The graph has a curvilinear relationship.

Which of the following would more than likely give you a negative correlation?

• Height and weight for a group of adults

• Daily high temperature and daily energy consumption for the summer

• SAT scores and college achievement

• Daily high temperature and daily energy consumption for the winter

Answer explanation

Negative: Higher temperature tends to decrease the need for heating, making this a likely negative correlation.

A correlation can never be greater than +1.00.

• True

• False

How would we classify a correlation that has a value of r = .68?

• Weak

• Strong

• Moderate

• No correlation

Correlations are best suited for ____ data.

• Discrete

• Continuous

What is the correlation of the data shown, to the nearest hundredth? (Approximately)

• 1.00

• 0.96

• -0.96

• -1.00

Answer explanation

1.00 or -1.00 would be a perfect line. Correlation is negative, so -0.96 is best option.