Which is the best estimate for the value of r in the scatter plot?
A. -1
B. -0.9
C. 0.2
D. 1
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I would say choice B is the best answer. The points all are very close to a single straight line that has negative slope, so the correlation coefficient r is going to be fairly close to -1. It won't be perfectly at r = -1 because all points need to be on the same straight line for that to happen. Side Note: without actual numbers for the coordinates, it's impossible to calculate the true value for r.
The best estimate for the value of r in the scatter plot is B. -0.9.
The correlation coefficient (denoted by r ) measures the strength of a linear relationship between two variables.
A scatter plot used to show the relation ship between variables.
If the points on the scatter plot appears to form a line that slants down from left to right, then there is a negative relationship.
So value of r must be negative.
Also we can draw a line that fits through the data, so it indicates strong relationship.
The r value for strong negative correlation must be lower than -0.7 .
Also its not perfect correlation so r cannot be -1.
So the only option is r= -0.9.
Thus, The best estimate for the value of r in the scatter plot is B. -0.9.
Learn more about correlation:
https://brainly.com/question/9319492