Which type of correlation is suggested by the scatter plot?
(1 point)
positive correlation negative correlation equal correlation no correlation
A scatter plot suggests a positive correlation.
Which type of correlation is suggested by the scatter plot?
(1 point)
positive correlation negative correlation equal correlation no correlation
Based on the given information, it is not possible to determine the correlation type.
For questions 3–4, use your calculator to create a scatter plot and line of best fit for the following set of data:
Average height of a species of tree (in feet) after a certain number of years
12345678 2.1 3.2 6.8 7.3 11.2 12.6 13.4 15.9
What is the correlation coefficient for the set of data? Round your answer to the nearest thousandth.
(1 point)
0.014
0.989
0.075
-0.977
The correlation coefficient for the set of data is 0.989.
About how tall would you expect one of these trees to be after 22 years?
(1 point)
22.31 ft. 35.2 ft. 44.25 ft. 46.2 ft.
Without the equation of the line of best fit or any specific information, it is not possible to accurately determine how tall one of these trees would be after 22 years.
You use a line of best fit for a set of data to make a prediction about an unknown value. The correlation coefficient for your data set is . How confident can you be that your predicted value will be reasonably close to the actual value?
(1 point)
I can’t be confident at all; this is about as close to a random guess as
you can get.
I can be a little confident; it might be close, or it might be way off.
I can be very confident; it will be close, but it probably won’t be exact.
I can be certain that my predicted value will match the actual value exactly.