Question

(6 points) 1. The height (in feet) and volume of usable lumber (in cubic feet) of 32 cherry trees are measured by a researcher. The goal is to determine if volume of usable lumber can be estimated from the height of a tree. The results are plotted below. 60 Volume 20 60.0 70.0 90.0 80.0 Height (a) In this study, the response variable is A. height B. neither height nor volume. The measuring instrument used to measure height is the response variable. C. volume. OD. height or volume. It doesn't matter which is considered the response.

Answer 1

1 a). opton C, volume

response variable is the dependent variable, the one which is plotted on y axis. so, volume.

1 b) option C, both A and B

outlier is the data value far away from the trend of other data points. In the plot, there is an outlier on the top left.

positive association means as x is increasing, y is also increasing, which is true.

2. this data has negative association means as x is increasing, y is decreasing. so correlation coefficient will be negative. Further, correlation coefficient -1 means perfect negative association, means all the points lie on the best fit line, which is not true in this case as the points are scattered. So, it will be around -0.9, option C

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