Question

Researchers initiated a long-term study of the population of American black bears. One aspect of the study was to develop a model that could be used to predict a bear's weight (since it is not practical to weigh bears in the field). One variable thought to be related to weight is the length of the bear. The accompanying data represent the lengths and weights of 12 American black bears. Complete parts (a) through (d) below. BE! Click the icon to view the data table BP Click the icon to view the critical values table. (a) Which variable is the explanatory variable based on the goals of the research? O A. The weight of the bear B. The length of the bear O C. The number of bears (b) Draw a scatter diagram of the data. Choose the correct graph below. ОВ. OA A Weight (kg) 180- Oc. ALength (cm) 180-1 OD A Weight (kg) 180- A Weight (kg 180- 99 40-1 100 Length (om 200 40-1 100 Length(cm 200 40+ 100 200 Length (cm) 200 Weight (kg) Click to select your answer and then click Check Answer 2 parts remaining OK Recycle Bin Control Panel Control Pant Network This PC Libranes

Answer 1

Answer (a): B (the length of the bear). Here, we want to predict bears weight based on the length of the bear. So, weight is the exploratory variable and length is the explanatory variable.

Answer (b): B

The scatter plot drawn in excel is shown below.

180 160 140 120 weight(kg) 100 80 60 40 100 110 120 130 140 150 160 170 180 190 200 Length (cm)