Correlation Coefficient Strong Positive Value

Hard Preparing For Higher Math Statistics And Probability

A researcher collected data on the number of hours studied per week and test scores of a group of students. The following data was recorded:

Hours Studied: 1, 2, 4, 4, 5, 5, 6, 8, 8, 9

Test Scores: 55, 60, 65, 70, 75, 80, 85, 90, 95, 100

To understand the relationship between the number of hours studied and test scores, the researcher calculated the correlation coefficient (r). Which of the following values for the correlation coefficient indicates a strong positive correlation between the variables studied?

$$r = 0.91$$

$$r = 0.50$$

$$r = -0.76$$

$$r = 0.20$$

Hint

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