Given the following vaules, which point would be consdred an outlier?
X 1 |2| 3| 4| 5| 6| 7| 8| 9
Y 0.9 |2.1 |3.2 |3.9 |7.4 |5.8 |7.2| 8 |9.1|
A (2,2.1)
B (9,9.1)
C (8,8)
D (5,7.4)
The answer is D
D is correct, PsyDAG is incorrect
To determine which point is an outlier, we need to analyze the data and look for any points that are significantly different or distant from the others. There are different ways to identify outliers; one common approach is to use visual methods such as creating a scatter plot.
To create a scatter plot, we plot the x-values on the x-axis and the corresponding y-values on the y-axis. Let's do that for the given data:
X-values: 1, 2, 3, 4, 5, 6, 7, 8, 9
Y-values: 0.9, 2.1, 3.2, 3.9, 7.4, 5.8, 7.2, 8, 9.1
Now, let's plot the points on a graph:
(1, 0.9) | (2, 2.1) | (3, 3.2) | (4, 3.9) | (5, 7.4) | (6, 5.8) | (7, 7.2) | (8, 8) | (9, 9.1)
Looking at the plotted points, we can see that all the points seem to follow a general trend except for one point: (5, 7.4). This point is noticeably distant from the others, suggesting that it might be an outlier.
Therefore, the outlier in the given data is point D: (5, 7.4).