Strength of Correlation

Question 1

Which best describes the strength of a model with an r-value of 0.29?

Revolt · Accepted Answer

a weak positive correlation

Question 2

Which r-value represents the most moderate correlation?

Revolt · Accepted Answer

0.56

Question 3

The table shows the shipping costs for items of different values.

Revolt · Accepted Answer

a strong positive correlation

Question 4

The table shows the time a patient spends at the dentist and the amount of the bill.

Revolt · Accepted Answer

0.93

Question 5

Which graph shows data whose r-value is most likely closest to 0?

Revolt · Accepted Answer

A graph shows both axes unnumbered. Points are scattered all over the graph.

Question 6

A graph shows the horizontal axis numbered 4 to 16 and the vertical axis numbered 4 to 12. Points and a line show a downward trend.

Revolt · Accepted Answer

–0.91

Question 7

A graph shows the horizontal axis numbered 1 to 5 and the vertical axis numbered 1 to 5. Points and a line show an upward trend.

Revolt · Accepted Answer

0.19

Question 8

The number of grams of zero-calorie sodium in a restaurant meal is compared to the total number of calories in the meal. The correlation coefficient relating the two variables is 0.74.

Revolt · Accepted Answer

It is a strong positive correlation,and it is not likely causal.

Question 9

Which r–value represents the strongest negative correlation?

Revolt · Accepted Answer

–0.7

Question 10

A 2-column table with 4 rows. The first column is labeled x with entries 0, 5, 10, 15. The second column is labeled y with entries 15, 10, 5, 0.

Revolt · Accepted Answer

-1

Strength of Correlation Answers

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