To determine which point is the outlier in the scatterplot describing the relationship between hours studied and test grades, we need to consider the overall trend and pattern of the other points.
The majority of the points are clustered around higher test grades (77 to 98) when students have studied between 1 and 4.5 hours. However, the point (0.5, 45) stands out as it lies significantly below the other points in terms of test grade for the amount of study time.
The point (0.5, 45) is particularly noteworthy because:
- It corresponds with only 0.5 hours of study, which tends to align with lower grades.
- The test grade of 45 is much lower than the grades achieved by those who studied longer.
Thus, the outlier is:
(0.5, 45)