Correlations

• Positive, strong

• Positive, weak

• Negative, strong

• Negative weak

• Positive, strong

• Positive, weak

• Negative, strong

• Negative, weak

• Positive, strong

• Positive, weak

• Negative, strong

• Negative weak

This is a graph of the cost per TV (y) and the number of TVs purchased at a store(x). Which sentence describes what's happening on this graph? Select all that apply.

• More TVs are purchased when the cost is low.

• Fewer TVs are purchased when the cost is high.

• More TVs were purchased when they cost more.

• Fewer TVs are purchased when the cost is low.

This graph shows the relationship between the outside temperature(y) and the number of customers in the ice cream shop(x). Which sentence describes what's happening in the graph? Select all that apply.

• More customers are in the store when the temperature is higher.

• Fewer customers are in the store when the temperature is lower.

• More customers are in the store when the temperature is lower.

• Fewer customers are in the store when the temperature is higher.

What type of relationship does this graph have?

• Positive Association

• Negative Association

• No Association

The following scatter plot shows the weights and lengths of some dinosaurs.  Which statement accurately describes the information?

• The information shows a positive correlation.  The weight of a dinosaur tends to increase according to its length.

• The information shows a negative correlation.  the weight of a dinosaur tends to decrease according to its length.

• The information shows no correlation.  The weight and length vary according to the type of dinosaur.

• The information shows no correlation.  The relationship between the weight and length of a dinosaur is uncertain.

What type of correlation do the data here represent?

• positive

• negative

• no correlation

Estimate the correlation coefficient for this scatterplot.

• r = -0.9

• r = 1

• r = 0.9

• r = -1

Estimate the correlation coefficient

• r = 1

• r = -1

• r ≈ -0.8

• r ≈ 0.8

• r ≈ -0.5