Strength of Correlation — Unit test Answers

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

Which r-value represents the weakest correlation?

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

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

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.

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.

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.

Which r–value represents the strongest negative 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.