Strength of Correlation Answers

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

Which r-value represents the strongest correlation?

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.

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

Ryan gathered data about the age of the different dogs in his neighborhood and the length of their tails.

Which r-value represents the weakest correlation?

The number of times a player has golfed in one’s lifetime is compared to the number of strokes it takes the player to complete 18 holes. The correlation coefficient relating the two variables is –0.26.

Which r-value represents the most moderate correlation?

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.

Which relationships would most likely be causal? Select two options.a positive correlation between the number of homework assignments completed and the grade on the exama positive correlation between the temperature in a canyon in the early spring and the number of snakes seen by hikersa positive correlation between a child’s shoe size and reading speeda negative correlation between the time a glass of ice water sits on the counter and its temperaturea positive correlation between the number of students attending football games and the number of games that are won